A record El Niño winter is coming: should you buy flood insurance in California this month?

By Daniel Masarsky, CA Lic. 0D87510

Updated October 19, 2026. Forecasters are warning that this winter could be one of California’s wettest in years. In a USA Today report on October 18, UC Agriculture and Natural Resources climate scientist Daniel Swain said, “A stronger El Niño brings stronger atmospheric rivers,” and wrote that this El Niño is on track to become “the strongest, and also easternmost-centered, event on record (if it isn’t already).” AccuWeather told the paper the first atmospheric river could arrive as early as mid-November, with the most frequent storms in January and February.

That matters for your insurance because most California homeowners, renters and business policies do not cover flooding, and a new flood policy usually doesn’t start until 30 days after you buy it. If you wait until a storm is in the forecast, it’s too late. Here is what to check and what we’d do in the next few weeks.

Why the timing is tight this year

The 30-day wait. FEMA says a National Flood Insurance Program (NFIP) policy goes into effect 30 days after purchase. The main exceptions are buying while you make, increase, extend or renew a mortgage, and a few map-change and wildfire situations. A policy bought today would start around mid-November, which is when AccuWeather says the first atmospheric river could show up.
A December 11 federal deadline. The NFIP is currently authorized only until December 11, 2026, according to the Congressional Research Service. If Congress doesn’t extend it by then, the NFIP’s authority to issue new flood policies expires. Policies already in force would continue to the end of their one-year term. The program lapsed from October 1 to November 12, 2025, so this is not a hypothetical risk.
The state is already preparing. On September 23, after Governor Newsom’s emergency declaration for a “likely historic” El Niño, Insurance Commissioner Ricardo Lara urged Californians to review their coverage and consider flood insurance before the 30-day waiting period becomes a problem.
Storms have already hit. USA Today reported that remnants of eastern Pacific Hurricane Rachel brought flooding to Southern California earlier this month, and AccuWeather said high tides and surge damaged homes along the Long Beach Peninsula and flooded Newport Beach’s Balboa Peninsula.

What your home or business policy usually covers in a storm

According to the California Department of Insurance:

Usually not covered: damage from flooding, mudslides and debris flows under homeowners, renters and commercial policies, unless a recent wildfire or another covered peril caused it, directly or indirectly.
Mudslides after a wildfire: the Commissioner has reminded insurers of their legal duty to cover mudslide and debris-flow damage caused by wildfires that weakened hillsides. If you live below a recent burn scar, keep your policy and photos handy.
Often covered: damage from fallen trees is generally covered under standard homeowners policies, and some water damage from wind-driven rain may be covered.
Renters: your landlord’s policy doesn’t cover your belongings, and UC ANR notes that renters insurance doesn’t cover flood damage either.
Cars: flood and fallen-tree damage to a vehicle is covered only if you carry optional comprehensive coverage. Check your auto declarations page.

What NFIP flood insurance covers

Homeowners (including condo and townhouse owners in participating communities): up to $250,000 for the building and up to $100,000 for contents.
Renters: contents coverage up to $100,000.
Businesses: up to $500,000 for the building and up to $500,000 for contents, including inventory and equipment.
Not covered: temporary housing and extra living expenses while your home is repaired, business interruption losses, most property kept in basements, and property outside the building such as landscaping, decks, fences and pools.

NFIP rates are the same no matter which company or agent sells the policy. Private flood insurance is also available, the Department of Insurance notes; its limits, terms and waiting periods vary. If your home or building is worth more than the NFIP limits, ask about private or excess flood coverage.

What to do in the next two to three weeks

Check your flood risk. UC ANR recommends Cal OES’s MyHazards site (myhazards.caloes.ca.gov) to check an address for flood, landslide and tsunami hazards. Floods can happen outside mapped high-risk zones too.
Decide now, not when the forecast turns. If you want flood coverage, buy it soon enough that the 30-day wait ends before mid-November, and well before the December 11 NFIP deadline.
Read your current policy’s water language. Ask your broker how it handles wind-driven rain, fallen trees, mudslides near burn scars, and water or sewer backup. Some gaps can be closed with an endorsement; flood needs its own policy.
Business owners: look past the building. NFIP doesn’t cover lost income. Review business interruption and utility interruption coverage on your commercial policy, and confirm who insures the building. See commercial property insurance in California.
Landlords and HOAs: a unit owner’s or tenant’s policy won’t fix a gap in the building policy. Review the master or landlord policy now. See HOA insurance and landlord insurance.
Make a home inventory and prep the property. The Department of Insurance suggests recording your home and belongings with your phone. UC ANR suggests cleaning gutters, drains and culverts and removing dead tree limbs while the weather is dry.

Also this week in California home insurance

FAIR Plan rates are now higher. The FAIR Plan’s 29.1% average increase applies to new and renewing policies starting October 15, CBS San Francisco reported. Individual changes depend on location and wildfire risk. See our FAIR Plan guide and FAIR Plan plus DIC coverage.
A new non-admitted option for higher-value homes. On October 14, SageSure announced SageSure One in California: a non-admitted HO5 policy from Olympus Insurance Company for homes starting at $1 million in dwelling coverage, with up to $20 million in total insurable value. Homes in Very High Fire Hazard Severity Zones may qualify with a verified IBHS Wildfire Prepared Home Plus designation plus noncombustible hardening and strict defensible space. See high-fire-risk home insurance.
LA fire survivors and mortgage lenders. On October 15, the state’s Department of Financial Protection and Innovation ordered lenders to report how they’ve handled insurance payouts for Eaton and Palisades fire survivors, including delays and held funds. If your lender is holding your rebuild money, you can file a confidential complaint with DFPI.

Last week we covered California’s new nonrenewal law, SB 1301. If you’re weighing wildfire mitigation, see how home hardening is moving some owners off the FAIR Plan.

FAQ: El Niño and flood insurance in California

Does my homeowners policy cover flooding?

Usually not. Homeowners, renters and commercial policies typically exclude flood, mudslide and debris-flow damage unless a recent wildfire or another covered peril caused it. Flood coverage is a separate policy.

How long does it take for flood insurance to start?

An NFIP policy generally takes effect 30 days after purchase. There’s no wait when you buy it while making, increasing, extending or renewing a mortgage, and a few other exceptions apply.

What happens if the NFIP isn’t extended by December 11?

According to the Congressional Research Service, the NFIP couldn’t issue new flood policies until Congress acted again. Policies already in force would continue to the end of their term. Buying before the deadline avoids that risk.

I don’t live in a flood zone. Do I still need it?

It depends on your address and budget. FEMA notes that floods can happen anywhere, and NFIP pricing reflects your home’s risk, so lower-risk areas pay less. Ask us to look at it before you decide.

Want a flood quote or a storm-season policy review? Talk to ESI

ESI Insurance Brokers (Express Service Insurance Agency, Inc.) is an independent California broker at 2085 Van Ness Avenue in San Francisco. We review homeowners, condo, landlord, HOA and business policies and can help you look at flood coverage options before storm season.

Get a California insurance quote →

Or call (415) 440-5136 · CA LIC# 0G83954

Sources

This article is general information, not legal advice or a coverage determination. Your policy terms control, and flood program rules can change. Ask your broker how this applies to your property.