Sun Valley’s biggest natural hazard is inland flooding
Most of the natural-hazard damage FEMA expects in Sun Valley comes from inland flooding, and overall the risk is moderate for a U.S. community.
What stands out about Sun Valley’s weather risks
Read from FEMA’s records below. The page puts what stands out first.
Does Sun Valley flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Sun Valley. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Sun Valley isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Navajo County.How exposed is Sun Valley?
FEMA expects yearly storm and flood damage to homes and buildings here to be higher than in 55% of U.S. communities, mostly from inland flooding.
Calmer than 351 of the 467 Arizona towns we cover.
Sun Valley is smaller than a census tract, so it shares the figures of the tract around its center.
What Sun Valley faces
Each hazard’s share of the damage FEMA expects here, and how it compares with the rest of the country.
Inland flooding
Lightning
Earthquakes
Federal disasters declared here
None of the disasters declared for Navajo County shows FEMA aid or repair money reaching Sun Valley itself in FEMA’s records.
Navajo County has had 17 natural disasters declared since 1953, most often floods and fires.
Get ready for what Sun Valley actually faces
A short kit for its top hazards, 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.
- When thunder roars, go indoors.
- Wait 30 minutes after the last thunder.
- Unplug electronics before the storm.
- 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.
Most disasters here begin in June–July
The month each of Navajo County’s 17 declared disasters began, since 1953.
What these numbers can and can’t tell you
- An average, not a forecast. FEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.
- Compared by rate. “Higher than N%” compares yearly damage as a share of what’s there, so a big city isn’t rated riskier just for having more buildings.
- Money that reached town. Flood claims are matched to Sun Valley’s own flood-insurance community; household aid to the registrant’s city; repair grants to Sun Valley.
- It follows property value. FEMA’s model weighs damage to buildings, so a place that recently lost many homes can rate lower than it feels.
Storm stories
Memories, warnings and help from neighbors in Sun Valley.
Your answer becomes a post in Town Square.
Sources: FEMA National Risk Index (December 2025); 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. Census tracts: U.S. Census Bureau. Weather alerts: National Weather Service. Preparedness tips: Ready.gov. An average of past damage, not a forecast.