Guam Natural Disaster Risk by County
FEMA's National Risk Index (v1.20, December 2025) has no overall risk score for Guam's 1 area, but estimates $216 million a year in expected losses from natural hazards.
OpenFEMA lists 25 federal disaster, emergency and fire management declarations for Guam since 1962 (not counting COVID-19); the latest is EM-3659-GU, Typhoon Champi, declared 17 October 2026.
Every Guam county, highest overall risk first
1| # | County | Overall risk | Score | Loss a year | Top hazard | Declarations | Tornadoes |
|---|---|---|---|---|---|---|---|
| — | Guam | Insufficient Data | — | $216 million | — | 22 | 0 |
Score: FEMA's national percentile (higher = more risk). Declarations: federal declarations that named the county since 1953, not counting COVID-19. Tornadoes: NOAA SPC tornadoes that touched the county, 1950–2025.
Latest federal declarations in Guam
Other states and territories
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What this page shows, and what it misses
FEMA's National Risk Index compares every US county with every other for 18 natural hazards, combining expected losses with social vulnerability and community resilience. It is a planning-level estimate for nationwide comparison, not a flood-zone map and not the risk to any one property — for flood zones use FEMA's Flood Map Service Center ↗. Federal declarations exclude state declarations and SBA or USDA designations.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Guam
Which county in Guam has the highest natural disaster risk?
FEMA's National Risk Index (v1.20, December 2025) has no overall risk score for Guam's 1 area, but estimates $216 million a year in expected losses from natural hazards.
How many FEMA disaster declarations has Guam had?
OpenFEMA lists 25 federal disaster, emergency and fire management declarations for Guam since 1962 (not counting COVID-19); the latest is EM-3659-GU, Typhoon Champi, declared 17 October 2026.