More hazard damage per building is expected in Mayfair than in 86% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Mayfair gets a D for hazard risk: higher expected damage per building than 86% of U.S. towns, #232 of 847 in California. Most of that expected damage is river and rain flooding (78%), then earthquakes (22%). FEMA’s files show no paid flood insurance claims here.
Graded on FEMA’s expected yearly building damage per dollar of building value (NRI v1.20, December 2025), weighted by where residents live; flood claims are shown, not graded. How hazard risk is graded
What Mayfair faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
River and rain flooding
Earthquakes
Shares are of FEMA’s expected building damage, the measure the grade uses; ranks compare each hazard’s building-damage rate with all 85,154 U.S. census tracts. In FEMA’s terms, river and rain flooding is FEMA’s “Inland Flooding” (rivers and streams overflowing their banks, or rain overwhelming drainage). FEMA defines coastal flooding as high or rising tides and storm surge, so surge damage is counted there. Drought isn’t listed: FEMA counts its losses in crops only.
What’s behind Mayfair’s grade
River and rain flooding is 78% of the building damage FEMA expects in Mayfair, and Mayfair’s rate of river and rain flooding damage is higher than 90% of U.S. census tracts. Next is earthquakes at 22% (higher than 85% of U.S. census tracts).
D #232 of 847 in California; higher expected damage per building than 86% of U.S. towns (21,298).
Mayfair’s residents live in 3 census tracts; FEMA’s figures are combined by where they live.
The typical California town has higher expected damage than 92% of U.S. towns; within the state, Mayfair has less expected damage per building than 73% of California towns.
In dollars, FEMA expects about $1.0M a year in losses across Mayfair: $927K to buildings, the rest to people and crops.
Does Mayfair flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Mayfair. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Mayfair isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Fresno County.The storms Mayfair remembers
None of the 15 disasters declared for Fresno County shows FEMA aid or repair money reaching Mayfair itself in FEMA’s records, so these are its biggest flood-claim years.
Fresno County has had 15 natural disasters declared by the President since 1953, most often floods, then severe storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Also 2 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Fresno County, 2016–2020.
Get ready for what Mayfair faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- Turn around at flooded roads: a foot of moving water can carry off a car.
- Flood insurance usually takes 30 days to start, so buy it before the forecast.
- Keep papers and medicines up high, in a grab-and-go bag.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- Look up the address on FEMA’s flood map.
- Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
- Get a flood insurance quote early: policies usually start 30 days after you buy.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Questions about natural hazards in Mayfair
Is Mayfair at risk for natural disasters?
On FEMA’s National Risk Index, Mayfair has higher expected damage per building than 86% of U.S. towns: D for hazard risk, #232 of 847 in California. Most of the expected damage is river and rain flooding (78%) and earthquakes (22%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Is Mayfair in a flood zone?
Flood zones are drawn street by street, so the answer depends on the address: look it up on FEMA’s flood map. In Fresno County, 20% of homes in mapped flood zones carry federal flood insurance, and 0.3% of all homes do.
How much is flood insurance in Mayfair?
FEMA’s Community Rating System list shows no discount for Mayfair’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is Mayfair at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (78%), and Mayfair’s rate for it is higher than 90% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Mayfair.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Mayfair’s residents lived in the 2020 census; OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Homes: Census ACS 2020–24. Preparedness tips: Ready.gov. FEMA’s model is an average of expected damage, not a forecast. How hazard risk is graded.