Altadena, CA natural hazards
Most of the natural-hazard damage FEMA expects in Altadena comes from earthquakes, and overall the risk is very high for a U.S. community. Flood insurance has paid 14 claims here since 1978. 6 federal disasters brought FEMA money into town.
FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarationsHow exposed is Altadena?
FEMA expects yearly storm and flood damage to homes and buildings in Altadena to be higher than in 92% of U.S. communities, mostly from earthquakes and inland flooding.
What Altadena faces
Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.
Earthquakes
Inland flooding
Wildfire
Avalanches
Lower here
Not a risk here
Does Altadena flood?
Every paid claim on a federal flood insurance policy in Altadena, from FEMA’s records.
Biggest named events
- Pineapple Express - Southern: 3 claims, $3K
are insured
are insured
6 federal disasters brought FEMA money here
Disasters the President declared that paid out in Altadena itself: aid to households, or repair grants to Altadena.
Wildfires and Straight-Line Winds
Wildfires
Wildfires, Flooding, Mudflows, and Debris Flows
Wildfires
Severe Storms, Flooding, Debris Flows, and Mudslides
Wildfires, Flooding, Mudflow and Debris Flow Directly Related T
Altadena and the towns around it
How to read this page
FEMA’s expected losses across Altadena total about $35.3M a year, counting buildings, people and crops.
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.