Photo: Chevy111 · CC BY-SA 4.0Storms, floods and disasters in Green Valley
Green Valley isn’t graded for hazard risk: Green Valley has 880 residents; we grade towns of 1,000 or more.
What Green Valley faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
Wildfire
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.
Does Green Valley flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Green Valley. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Green 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: Los Angeles County.2 federal disasters brought FEMA money to Green Valley
Disasters that paid out in Green Valley itself (aid to households or repair grants to Green Valley), newest first, with that year’s flood claims.
- 2007Wildfires, Flooding, Mud Flows, and Debris Flows4 households applied for aid$775 aid approved
- 2004Severe Storms, Flooding, Debris Flows, and Mudslides1 households applied for aid$3K aid approved
Los Angeles County has had 40 natural disasters declared by the President since 1953, most often severe storms, then floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Also 44 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Los Angeles County, 2002–2025.
Old photos of Green Valley after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Green Valley archive →Get ready for what Green Valley faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- Clear dead leaves and brush within 5 feet of the house.
- Sign up for local alerts and know two ways out.
- Keep N95 masks for smoky days.
- 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 Green Valley
Is Green Valley 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 Los Angeles County, 33% of homes in mapped flood zones carry federal flood insurance, and 0.5% of all homes do.
How much is flood insurance in Green Valley?
FEMA’s Community Rating System list shows no discount for Green Valley’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
What was the biggest storm in Green Valley?
By FEMA money that reached Green Valley, Severe Storms, Flooding, Debris Flows, and Mudslides (2004): 1 households applied for aid, $3K approved.
Storm stories
Memories, warnings and help from neighbors in Green Valley.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Green Valley’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.