FEMA National Risk Index hazard
Prepare your home for tsunami
Large ocean waves from undersea earthquakes and landslides.
8 US counties are rated Relatively High or Very High for tsunami by FEMA’s National Risk Index. The three things that matter most at home: 1. Find out whether your home is in a tsunami hazard zone. 2. Know the walking route to high ground. 3. Strong shaking near the coast means move to high ground now.
Before the season
- Check the local tsunami evacuation map.
- Keep a go-bag by the door.
- Practice the route on foot.
When a warning comes
- Move to high ground or inland immediately.
- Do not wait to see the wave.
- Stay away until officials give the all clear.
After
- Expect more waves for hours.
- Avoid flood water and debris.
- Photograph damage before cleanup.
Ask your insurer
Ask whether tsunami damage is treated as flood under your policy. We explain and organize; we never predict coverage.
Ready.gov: Tsunamis Checklist: original casaq guidance
Counties with the highest tsunami scores
Top 25 by FEMA NRI risk score for this hazard. Scores and ratings are relative to other US counties, not probabilities of a loss.
| # | County | Rating | Score | Recorded events |
|---|---|---|---|---|
| 1 | Grays Harbor County, WA | Very High | 100.0 | 28 |
| 2 | Del Norte County, CA | Very High | 98.5 | 49 |
| 3 | Clatsop County, OR | Very High | 96.9 | 32 |
| 4 | Pacific County, WA | Very High | 95.4 | 28 |
| 5 | Humboldt County, CA | Relatively High | 93.8 | 49 |
| 6 | Honolulu County, HI | Relatively High | 92.3 | 147 |
| 7 | Maui County, HI | Relatively High | 90.8 | 147 |
| 8 | Curry County, OR | Relatively High | 89.2 | 32 |
| 9 | Aleutians West Census Area, AK | Relatively Moderate | 87.7 | 76 |
| 10 | Hawaii County, HI | Relatively Moderate | 86.2 | 147 |
| 11 | Coos County, OR | Relatively Moderate | 84.6 | 32 |
| 12 | Clallam County, WA | Relatively Moderate | 83.1 | 28 |
| 13 | Kenai Peninsula Borough, AK | Relatively Moderate | 81.5 | 67 |
| 14 | Kodiak Island Borough, AK | Relatively Moderate | 80.0 | 67 |
| 15 | Tillamook County, OR | Relatively Moderate | 78.5 | 32 |
| 16 | Lincoln County, OR | Relatively Moderate | 76.9 | 32 |
| 17 | Kauai County, HI | Relatively Moderate | 75.4 | 147 |
| 18 | Santa Cruz County, CA | Relatively Moderate | 73.8 | 83 |
| 19 | San Francisco County, CA | Relatively Moderate | 72.3 | 73 |
| 20 | San Mateo County, CA | Relatively Moderate | 70.8 | 73 |
| 21 | Marin County, CA | Relatively Moderate | 69.2 | 73 |
| 22 | King County, WA | Relatively Low | 67.7 | 12 |
| 23 | Aleutians East Borough, AK | Relatively Low | 66.2 | 76 |
| 24 | Los Angeles County, CA | Relatively Low | 64.6 | 83 |
| 25 | San Luis Obispo County, CA | Relatively Low | 63.1 | 83 |