Drought risk in California

What drought looks like from the Central Valley to the Sierra foothills

Your lender hands you a closing date, and you drive out to see the house one more time. The lawn is brown. The well pump cycles longer than it did last month. In Fresno County, Kern County, or out toward the Sierra foothills, that is not a yard problem. It is a water problem that can follow you for years.

California gets a 5 out of 5 on drought risk for a reason. The state swings between very wet winters and long dry stretches. A single wet year does not refill the aquifers under the San Joaquin Valley. It does not fix a rural well that was drilled when the water table was higher. And it does not make the next dry spell less likely.

If you are buying in the Central Valley, the Central Coast, or the inland parts of Riverside and San Bernardino counties, drought shows up as three things: less water, worse soil, and more fire. On the North Coast and in Sonoma and Mendocino counties, it can look like empty rural wells and low streams. In Imperial Valley, it is a farm-water story that still touches household supply. The details change. The pattern does not.

What actually happens to a house

Drought does not usually knock a house down. It works slowly. Clay soil under a slab shrinks when it dries, and that can crack drywall, stick doors, and break tiles. In parts of Sacramento, Fresno, and the East Bay, foundation movement is a common complaint after a dry year. You may see cracks at the corners of windows or a gap under the baseboard.

Water quality can change, too. When a well runs low, you can pull up more sediment, or the pump can burn out from running dry. In some rural counties, people haul water or drill deeper. That is expensive, and it is not a one-time cost.

Then there is fire. Drought dries grass, brush, and trees. The wildfire risk near the Sierra Nevada, the North Coast ranges, and the hills of Los Angeles and San Diego counties gets worse when the rainy season fails. A dry house in a dry canyon is a different insurance problem than a house with a green lawn.

Here is the insurance reality. Standard homeowners insurance does not cover drought. There is no drought peril. Damage from soil settling or shrinking is often excluded as earth movement or settlement. A failing well is usually a maintenance issue, not a claim. Flood damage needs a separate flood policy, usually through NFIP. Earthquake damage needs a separate earthquake policy, often from the California Earthquake Authority. And after a wildfire, you may find that your insurer will not renew you, even if you paid every bill on time. Drought itself is not an insurable event; its side effects are where the gaps open up.

If you have a mortgage, your lender may care about fire risk more than drought risk. That does not mean you should ignore water. A house with a weak well or a cracked slab can be hard to sell, and repairs come out of your pocket.

If you only do three things

You cannot drought-proof California. You can make a house less likely to surprise you.

1. Check the water source before you close. If the house has a well, ask for the well log, the pump test, and the static water level. In Fresno, Kern, Tulare, or any rural county, call the county environmental health department and ask what nearby wells are doing. If the house is on a municipal system, ask the water district about supply reliability and any rationing history.
2. Walk the foundation and the yard. Look for cracks wider than a credit card, doors that do not latch, and sloping floors. Check the soil around the foundation. If it is pulling away, that is a clue. A foundation inspector costs money. A bad slab costs more.
3. Buy for the fire risk, not just the drought. Clear defensible space, check your roof and vents, and read your insurance policy for fire exclusions. In high-risk parts of California, the FAIR Plan may be your only option. That is separate from drought, but drought makes it worse.

If I had one weekend and a limited budget, I would start with the well or water source. Everything else — the lawn, the tank, the drip system — can wait. Water first.

Questions we get

Does California drought risk affect my homeowners insurance?

Not directly. Standard policies do not cover drought. They may cover a fire that starts during a dry spell, but they often exclude soil movement, settlement, and well failure. Flood and earthquake are separate policies. If you are in a high fire zone, your bigger problem may be finding any insurer at all.

Should I buy a house with a private well in California?

Sometimes, yes — if the well is tested, the water level is stable, and you have a backup plan. In parts of the Central Valley and the Sierra foothills, wells can go dry in a bad year. Ask for the well log, talk to neighbors, and budget for a deeper pump or a storage tank. Do not assume the well will always produce like it did on the day you toured the house.

What can I do about drought damage that is already happening?

Document it. Take photos of cracks, keep water bills, and get a foundation or well inspection. If the damage is from soil movement, your insurance likely will not pay. Fix the water source first, then the soil. Sometimes a soaker hose around the foundation and better drainage can slow the movement. Sometimes you need an engineer.

Where to verify this

Do not take our word for it. California drought conditions change by county and by month. Check the current map before you make an offer, and check it again before you buy insurance.

• California Governor's Office of Emergency Services — state emergency info and drought resources.
• US Drought Monitor — weekly maps that show which parts of California are dry.
• Drought.gov — federal drought data and outlooks.
• EPA WaterSense — simple ways to cut indoor and outdoor water use.

California is a big state. Drought in Mendocino County is not the same as drought in Imperial County. But the insurance gaps, the well problems, and the foundation cracks show up in similar ways. Start with water. Then work outward.