El Niño Is Coming. Flood Insurance Can Take Up to 30 Days to Start.

Your homeowners policy does not cover this

Standard homeowners policies exclude flood. That includes rain runoff that pours in under a door or down a driveway, even when yours is the only house it reaches. A burst pipe is usually covered. Water rising in from outside usually is not.

Flood insurance is a separate policy. Through the National Flood Insurance Program, a home can be covered for up to $250,000 on the building and $100,000 on belongings. Renters can buy coverage for their belongings on its own.

Remember January 22, 2024? San Diego got 2.73 inches of rain in one day, the fourth wettest day since records began in 1850. About 5,000 residents were affected, Southcrest and Shelltown took the worst of it, and many of the hardest hit families had no flood insurance or not nearly enough. Disaster aid helped some of them, but it is not a plan. Grants tend to be small, and disaster loans have to be paid back.

Why the calendar matters more than usual

New flood coverage does not start the day you buy it. Depending on the policy, it can take up to 30 days to kick in, so a policy bought the day before a storm will not cover that storm.

There is a second clock this year. Congress has only authorized the National Flood Insurance Program through December 11. When the program lapsed during the 43-day government shutdown in late 2025, no new federal flood policies were sold or renewed until it came back. Congress has passed 36 short-term extensions since 2017, so another lapse is a real possibility.

Private flood insurance does not depend on Congress at all, and some private policies offer higher limits or pay for a hotel while your home is repaired. The definitions differ too. The federal policy only treats water as a flood when it covers at least two acres or reaches two or more properties, and some private policies drop that requirement.

What to do before the rain starts

1. Check your policy. Look at your declarations page. If flood is not listed, you do not have it, and most homeowners do not.
2. Do not rely on the flood map alone. A low risk zone is not a no risk zone. FEMA's own line is that anywhere it can rain, it can flood, and heavy rain finds streets, canyons, and low spots that were never mapped as high risk.
3. Compare federal and private options. Look at the waiting period, the limits, how garages and lower levels are treated, and whether living expenses are covered while you are out of the house.
4. Buy by mid November. That clears a waiting period of up to 30 days before the heart of the season, December through February, and gets you ahead of the December 11 deadline for the federal program.
5. Get the house ready. Clean gutters and downspouts, make sure water drains away from the foundation, move valuables off the floor in garages and lower levels, and take a quick video of your belongings for your records.