Which utility company is best at preventing wildfires

Last updated 2026-07-25

Which utility company is best at preventing wildfires right now?

Short answer: San Diego Gas & Electric (SDG&E) generally ranks highest among California's big three investor-owned utilities for wildfire mitigation execution, and Southern California Edison (SCE) has made the fastest recent progress on undergrounding. Pacific Gas & Electric (PG&E) still carries the worst track record of any major utility in the country, and PacifiCorp in Oregon was found liable for the deadliest fire complex in that state's history. That ranking isn't a permanent scoreboard. It shifts year to year based on audits from the California Public Utilities Commission (CPUC), wildfire mitigation plan updates filed with the Office of Energy Infrastructure Safety (OEIS), and whatever happened during the last red flag warning season. SDG&E was the first California utility to build a real wildfire safety program after its equipment caused the 2007 Witch, Guejito, and Rice fires, which burned over 197,000 acres and killed two people ^[1]. That head start still shows up in its metrics: more weather stations, more covered conductor, and a public safety power shutoff (PSPS) program regulators consider more targeted than PG&E's. PG&E's Camp Fire in 2018 killed 85 people and destroyed the town of Paradise, the deadliest wildfire in California history, caused by a failed transmission line hook on a tower nearly a century old ^[2]. PG&E pleaded guilty to 84 counts of involuntary manslaughter. Since then the company has spent tens of billions on hardening, but it still runs the largest, oldest grid in the highest-risk terrain in the state, and it's still catching up. None of this changes what you have to do at your own house. A utility's grade doesn't show up on your insurer's wildfire inspection form.

How do CAL FIRE and state regulators actually grade utilities on wildfire prevention?

California doesn't publish a single letter-grade ranking, but it does require every electric utility serving high fire-threat areas to file an annual Wildfire Mitigation Plan (WMP) with OEIS, which absorbed this oversight role from the CPUC in 2021. These plans are audited, and utilities get compliance findings, not grades, but the findings are public and they're the closest thing to a scorecard that exists ^[3]. The metrics that matter most in those filings are miles of distribution line hardened or undergrounded, number and duration of Public Safety Power Shutoff events, ignitions caused by utility equipment per year, and vegetation management completion rates against self-set targets. PG&E has committed to underground 10,000 miles of distribution line in high fire-threat districts, a program it says will take until roughly 2035 to complete at current pace and cost (PG&E has estimated the program at more than $15 billion) ^[4]. SCE and SDG&E have smaller service territories with less mileage to convert, which is part of why their completion percentages look better even when total investment is similar. CAL FIRE's role here is narrower than people assume. CAL FIRE maps Fire Hazard Severity Zones and sets vegetation clearance rules around structures under Public Resources Code 4291, but it does not regulate utility equipment standards or grade utility wildfire programs. That job sits with OEIS and the CPUC ^[4]. If you're trying to find out whether your specific utility is in compliance, the WMP annual reports on the OEIS site are the primary source, not a general CAL FIRE page.

When does the California defensible space law go into effect?

California's core defensible space law, Public Resources Code 4291, has been in effect for decades and currently requires 100 feet of defensible space clearance around structures in State Responsibility Areas and in Wildland-Urban Interface areas designated by local government, or to the property line if it's less than 100 feet ^[5]. That part isn't new and isn't changing in 2026. What is changing is the "ember-resistant zone" rule, sometimes called Zone 0, which requires the 0-to-5-foot zone immediately around a structure to be cleared of combustible materials: no bark mulch, no wood fencing attached to the house, no stored firewood, nothing that catches an ember and carries it into the structure. The State Board of Forestry and Fire Protection has been developing these Zone 0 regulations under authority granted by Assembly Bill 3074 (2020), and as of this writing the regulation has been delayed multiple times; the Board's own rulemaking timeline has targeted adoption with compliance dates discussed for 2025 and pushed toward 2026 for existing homes in high-risk zones. Check the Board of Forestry's current rulemaking page before you assume a hard date, because this has slipped before and could slip again. If you got a non-renewal notice citing defensible space, don't wait for Zone 0 to become mandatory. Insurers are already asking about it informally in their own wildfire risk models, years ahead of the regulation catching up. For the itemized zone-by-zone breakdown, see defensible space clearing requirements.

What fire-safe rules for homes take effect in 2026?

The honest answer is: it depends on your fire district, and this is one of the more fluid areas in California fire policy right now. The state-level item most homeowners are watching is the Zone 0 ember-resistant zone rule discussed above, which the Board of Forestry has been moving toward finalizing with compliance windows that have been floated for 2025 to 2026 for homes in Very High Fire Hazard Severity Zones. Separately, California's building code already requires enhanced wildfire-resistant construction (Chapter 7A of the California Building Code) for new construction and additions in Fire Hazard Severity Zones, covering ember-resistant vents, Class A roofing, and non-combustible siding within 5 feet of the structure. That's existing law, not a 2026 change, but many homeowners confuse it with the newer Zone 0 rule because they overlap in the same 5-foot ring. Check your specific county or fire district's local ordinance page, because some jurisdictions (parts of Los Angeles County, Marin County, and San Diego County among others) have already adopted their own Zone 0-equivalent rules ahead of the state deadline, with earlier effective dates and different enforcement mechanisms than the state timeline. Don't assume state deadlines are your deadline. Local fire marshals can and do move faster.

Why won't people follow the defensible space law in California?

Cost, confusion, and enforcement gaps are the three real reasons, and none of them are mysterious. A 2020 CAL FIRE-funded study and multiple county assessor surveys have found compliance with defensible space inspections running well below 100% even in high-hazard zones, and CAL FIRE's own inspection data shows a meaningful share of properties fail their first inspection every year. Cost is the biggest barrier for a lot of people. Clearing 100 feet of brush on a sloped, oak-covered lot isn't a weekend project; contractor quotes commonly run into the thousands of dollars for a single property, and retrofitting Zone 0 (removing wood fencing, replacing bark mulch, moving woodpiles) adds more on top. For homeowners on fixed incomes, especially in older rural communities, that's real money they don't have sitting around. Confusion is the second driver. The rules differ by zone (0 to 5 feet, 5 to 30 feet, 30 to 100 feet), by whether you're in a State Responsibility Area or a Local Responsibility Area, and by whether your local fire district has its own stricter overlay. A lot of homeowners genuinely don't know what's required until an inspector shows up or an insurer sends a letter. Enforcement is inconsistent. Local fire departments are supposed to do inspections and can issue citations, but staffing is thin in a lot of rural districts, and a warning letter with no follow-up doesn't create urgency. People respond to consequences, and until the consequence is a non-renewal notice, the law can feel optional. It isn't. For the layered zone requirements broken down clearly, see fire safe landscaping next to your house.

How to prevent wildfires (what actually works, ranked by impact)

At the household level, the two things that matter most are defensible space clearance and ember-resistant construction details, because most homes that burn in wildfires ignite from embers landing on or near the structure, not from a wall of flame arriving. Research from the Insurance Institute for Business & Home Safety (IBHS) and CAL FIRE both point to the same conclusion: embers can travel over a mile ahead of a fire front, and the 0-to-5-foot zone around a house is where most home ignitions start ^[6]. At the community level, coordinated fuel breaks, prescribed burns, and utility infrastructure hardening matter more than any single homeowner's yard. CAL FIRE's Vegetation Management Program and prescribed burn permitting exist because fuel load reduction across a landscape does more than isolated defensible space work, though both are needed together. At the utility level (since that's the topic here), the levers are covered conductor, undergrounding, weather-sensing equipment that triggers automatic shutoffs, and vegetation clearance around power lines, which is regulated separately from residential defensible space under Public Utilities Code provisions enforced by the CPUC. Realistically, you control your house and your yard. You don't control the utility's capital spending plan or the county's prescribed burn calendar. Put your effort where it counts: your own Zone 0, your vents, your roof, your gutters.

How to prevent forest fires and how to avoid forest fires (the human-caused fire problem)

Roughly 85% of wildfires in the United States are caused by humans, according to the National Interagency Fire Center and cited repeatedly by the U.S. Forest Service, and the leading causes are unattended campfires, equipment sparks (including dragging chains, mowing dry grass, and vehicle exhaust), debris burning, and arson. Preventing forest fires at the individual level mostly means controlling ignition sources, not fighting fire once it starts. The practical list: never leave a campfire unattended and always drown it completely (Ready.gov and the U.S. Forest Service both stress "drown, stir, and feel" before leaving a fire site); don't park or idle vehicles on dry grass, since catalytic converters can reach 1,000°F; avoid mowing or using metal-blade equipment on dry vegetation during red flag warnings; check local burn permit rules before any debris burning, since many counties suspend permits entirely during fire season; and report unattended fires or suspicious smoke immediately rather than assuming someone else called it in. On public land, respect fire restrictions and closures, which exist precisely because a single ignition source in dry, wind-driven conditions can become a fire that burns tens of thousands of acres within days. The 2018 Camp Fire and 2020 Creek Fire both started from single, preventable ignition points that spread explosively under extreme fuel and wind conditions.

How to prepare for a wildfire (before, during, and immediately after)

Preparation splits into three phases, and most people only do the first one halfway: harden the house, build a go-kit and evacuation plan, and know what documentation you'll need if you have to file an insurance claim. Hardening means the defensible space zones already covered, plus structural details: ember-resistant vents, a Class A roof, gutters cleared of debris, no combustible mulch or fencing touching the house. Ready.gov's wildfire preparedness guidance recommends creating and maintaining defensible space and using fire-resistant building materials as the two top actions homeowners can take before fire season ^[7]. Go-kit and evacuation planning means having a bag ready with medications, documents, chargers, and basics for at least 72 hours, plus two evacuation routes memorized because one may be blocked. Sign up for your county's emergency alert system now, not during a fire, since cell towers and networks can get overloaded during mass evacuations. Documentation is the part most homeowners skip and regret. Before fire season, photograph and video every room, your exterior, your roof, and your defensible space work, dated and timestamped. If you're ever in a claim dispute, contemporaneous proof that you maintained your property is worth more than any argument you make after the fact. This is also the exact gap the Wildfire Insurance Survival Kit is built to close: a $99 one-time toolkit that helps you organize dated photos, inspection records, and mitigation receipts into the kind of file insurers and adjusters actually want to see, before you ever need it. It doesn't file claims or talk to your insurer for you. It just makes sure you're not scrambling for proof after the fact.

How to prepare for forest fires if you live near wildland, more than near a structure

If your property backs onto forest or open wildland, the preparation list gets longer because you're managing a bigger fuel load and often a longer emergency response time. Beyond structure-focused defensible space, you need fuel breaks along property lines, cleared access roads wide enough for fire engines, and a water source firefighters can actually reach (a pond, cistern, or hydrant, clearly marked). CAL FIRE's Ready for Wildfire program recommends maintaining a minimum 10-foot clearance around propane tanks and outbuildings in addition to the standard structure zones, and keeping a chainsaw-cleared access path at least 12 feet wide if you're on a private road ^[8]. If you're in a genuinely rural, forested parcel, talk to your local fire district about a formal fuel break or shaded fuel break, which reduces flame length and rate of spread across a wider area than any single-lot clearing job can. Rural homeowners should also plan for longer power outages during PSPS events, since utilities are more likely to de-energize lines in remote, high-wind terrain first. A backup power plan for well pumps and medical equipment isn't optional out there, it's basic preparedness.

Is Santa Barbara safe from fire?

No coastal California community is "safe" from fire in an absolute sense, and Santa Barbara County has a documented history that says otherwise. The 2017 Thomas Fire burned over 281,000 acres and was, at the time, the largest wildfire in modern California history, followed days later by the Montecito debris flow that killed 23 people when rain hit the burn scar ^[9]. The county sits at the edge of chaparral-covered foothills with strong sundowner winds, a combination fire scientists consider one of the more dangerous wildfire wind patterns in the state. Parts of Santa Barbara County, particularly the foothill communities like Montecito, Mission Canyon, and the areas above the 101 corridor, are mapped by CAL FIRE as Very High Fire Hazard Severity Zones. Lower, flatter parts of the city closer to the ocean carry meaningfully less wildfire risk, but they're not zero, and insurers have been pulling back from coastal-adjacent hillside properties across the county regardless of how the specific parcel maps out. If you're evaluating a specific address, check the CAL FIRE Fire Hazard Severity Zone viewer for that parcel rather than relying on the county's general reputation, since risk varies block by block based on slope, vegetation, and wind exposure. For broader county-level risk patterns, see state defensible space and hazard mapping rules.

How can we prevent forest fires at a community or policy level?

Beyond individual behavior, the levers that move the needle at scale are prescribed burning, mechanical fuel thinning, utility grid hardening, and building codes that require ember-resistant construction in high-hazard zones. None of these are fast or cheap, and none of them work in isolation. The U.S. Forest Service and CAL FIRE both run prescribed burn programs intended to reduce accumulated fuel loads that build up after decades of fire suppression, a policy the Forest Service itself has acknowledged contributed to unnaturally dense, fire-prone forests across the West . California's SB 1260 (2018) expanded liability protections for prescribed burn practitioners specifically to encourage more controlled burning, since fear of liability had been a major reason private landowners avoided it. At the state and county level, updated building codes (Chapter 7A construction standards), zoning restrictions on new development in Very High Fire Hazard Severity Zones, and utility undergrounding mandates all reduce future ignition risk and future losses, but they take years to show results because they mostly apply to new construction, not the millions of existing homes built before these codes existed. That's the uncomfortable truth: policy fixes the next generation of homes. Your home right now is on you.

Frequently asked questions

When does the California defensible space law go into effect?

The core 100-foot defensible space requirement under Public Resources Code 4291 has been law for years already. What's new is the Zone 0 ember-resistant zone rule (0 to 5 feet from structures), which the Board of Forestry has been finalizing with compliance dates discussed for 2025 to 2026 in Very High Fire Hazard Severity Zones. Check the Board of Forestry's current rulemaking page for the confirmed date, since it has slipped before.

Why won't people follow the defensible space law in California?

Mainly cost, confusion about which zone rules apply to their property, and inconsistent enforcement. Clearing 100 feet of brush can cost thousands of dollars, the zone rules differ by responsibility area and local overlay, and many rural fire districts lack staff to inspect and cite noncompliant properties consistently, so the consequence often doesn't arrive until an insurer sends a non-renewal letter.

How to prevent wildfires at the household level?

Focus on defensible space clearance in the 0-5, 5-30, and 30-100 foot zones around your home, plus ember-resistant construction details like Class A roofing, ember-resistant vents, and non-combustible materials near the foundation. CAL FIRE and IBHS research both point to embers, not flame fronts, as the main way homes ignite, so that's where your money and effort should go first.

How to prepare for a wildfire if I get evacuation warnings?

Have a go-kit ready with medications, documents, and 72 hours of supplies, know two evacuation routes, sign up for county alerts now, and photograph your home's interior, exterior, and defensible space work before fire season starts. Ready.gov lists defensible space and fire-resistant materials as the top pre-season priorities for homeowners in fire-prone areas.

How to prevent forest fires caused by human activity?

About 85% of U.S. wildfires are human-caused, per the National Interagency Fire Center, mostly from unattended campfires, equipment sparks, and debris burning. Drown campfires completely, avoid parking on dry grass, don't burn debris during red flag warnings or without checking local permit status, and report unattended fires or smoke immediately rather than assuming someone else did.

How to avoid forest fires when camping or working outdoors?

Fully drown and stir campfires before leaving, never leave them unattended even briefly, avoid mowing dry grass with metal blades during high-wind or red flag days, keep vehicles off dry vegetation since catalytic converters can hit 1,000°F, and check current local fire restrictions before any outdoor burning, since many counties suspend permits during peak season.

How to prepare for forest fires if my property borders wildland?

Add fuel breaks along property lines, keep a clear access road at least 12 feet wide for fire engines, maintain 10-foot clearance around propane tanks and outbuildings, and arrange a reachable water source like a marked pond or cistern. Plan for longer power outages too, since utilities de-energize remote high-wind lines first during PSPS events.

What fire-safe rules for homes take effect in 2026?

The state's Zone 0 ember-resistant zone regulation is the main one under discussion, with compliance windows floated for 2025-2026 in Very High Fire Hazard Severity Zones, though the timeline has shifted multiple times. Some counties, including parts of Los Angeles and San Diego, have already adopted their own equivalent rules ahead of the state deadline, so check your local fire district directly.

Is Santa Barbara safe from fire?

No. Santa Barbara County has burned repeatedly, including the 2017 Thomas Fire (281,000+ acres) and the deadly Montecito debris flow that followed. Foothill communities like Montecito and Mission Canyon are mapped Very High Fire Hazard Severity Zones; lower, flatter coastal areas carry less risk but aren't risk-free. Check CAL FIRE's hazard viewer for your specific parcel.

How can we prevent forest fires at a community level?

Prescribed burning, mechanical fuel thinning, utility grid hardening (undergrounding, covered conductor), and building codes requiring ember-resistant construction in high-hazard zones all reduce future risk. California's SB 1260 expanded liability protections to encourage more prescribed burning. These measures take years to show results since most apply mainly to new construction, not existing homes.

Which utility has caused the most wildfires in California?

PG&E has the worst documented record, including the 2018 Camp Fire (85 deaths, the deadliest wildfire in California history), caused by a failed century-old transmission line hook. PG&E pleaded guilty to 84 counts of involuntary manslaughter. It has since spent tens of billions on grid hardening but still serves the largest, oldest, highest-risk grid footprint in the state.

Does a utility's wildfire safety record affect my home insurance rates?

Indirectly, yes. Insurers price wildfire risk partly on regional ignition history, which includes utility-caused fires in your area, but your insurer still evaluates your specific property, defensible space, roof type, and construction materials independently. A utility improving its record doesn't guarantee your premium drops or your policy gets renewed.

Sources

1. Cal Fire, Camp Fire incident information: 2018 Camp Fire killed 85 people and is the deadliest wildfire in California history
2. Office of Energy Infrastructure Safety, Wildfire Mitigation Plans: OEIS reviews and audits annual Wildfire Mitigation Plans filed by California electric utilities
3. PG&E, Community Wildfire Safety Program / Undergrounding: PG&E's plan to underground 10,000 miles of distribution line in high fire-threat areas
4. California Public Resources Code Section 4291: CAL FIRE's defensible space clearance authority is set under PRC 4291, separate from utility equipment regulation
5. California Board of Forestry and Fire Protection, Ember-Resistant Zone (Zone 0) rulemaking: Zone 0 ember-resistant zone regulation development and proposed compliance timeline
6. USDA Forest Service, wildfire causes statistics: Roughly 85% of wildfires in the United States are caused by human activity
7. CAL FIRE, Ready for Wildfire defensible space guidance: Recommended clearance around propane tanks, outbuildings, and access road width standards
8. CAL FIRE, Thomas Fire incident information: 2017 Thomas Fire burned over 281,000 acres and was the largest California wildfire on record at the time
9. California Legislative Information, SB-1260 Fire prevention: prescribed burns: SB 1260 (2018) expanded liability protections for prescribed burn practitioners in California