Disaster-history hazard lens

Landslide history by county

Landslides, mudslides, and debris flows. Compare official county histories below while keeping FEMA administrative declarations separate from NOAA observed-event reports.

Data updated Aug 21, 2026

History, not a forecast

These counts do not measure current danger, probability, severity, loss, or personal exposure. A higher rank means only that a county has more records within the same official source and exact coverage window. FEMA and NOAA counts are never added together.

Administrative records

FEMA declaration history

Federal administrative declarations that include a county designation and map to this hazard category. A declaration is a government action, not a physical-event census.

0 counties have a positive landslide count in this source.

No positive fema declaration history count is present for this category among the atlas county profiles.

Observed-event reports

NOAA observed-event history

Distinct NOAA Storm Events records explicitly coded to a county and mapped to this hazard category. Forecast-zone and marine-zone records are excluded from county totals.

11 counties have a positive landslide count in this source.

Coverage: Jan 1, 1996 – Apr 12, 2026

Rankings compare only this source and exact coverage window. Equal counts share a rank.

Landslide noaa observed-event history by county
Rank	County	County-event records
1	King County, Washington	4

Coverage: Jan 1, 1996 – May 15, 2026

Rankings compare only this source and exact coverage window. Equal counts share a rank.

Landslide noaa observed-event history by county
Rank	County	County-event records
1	Honolulu County, Hawaii	11

Coverage: Jan 1, 1996 – May 26, 2026

Rankings compare only this source and exact coverage window. Equal counts share a rank.

Landslide noaa observed-event history by county
Rank	County	County-event records
1	Fresno County, California	40
2	Los Angeles County, California	24
3	Ventura County, California	7
4	Multnomah County, Oregon	5

Coverage: Jan 1, 1996 – May 28, 2026

Rankings compare only this source and exact coverage window. Equal counts share a rank.

Landslide noaa observed-event history by county
Rank	County	County-event records
1	Kanawha County, West Virginia	2
2	Bernalillo County, New Mexico	1

Coverage: Jan 1, 1996 – May 29, 2026

Rankings compare only this source and exact coverage window. Equal counts share a rank.

Landslide noaa observed-event history by county
Rank	County	County-event records
1	Ada County, Idaho	3
2	Salt Lake County, Utah	2

Coverage: Jan 1, 1996 – May 30, 2026

Rankings compare only this source and exact coverage window. Equal counts share a rank.

Landslide noaa observed-event history by county
Rank	County	County-event records
1	El Paso County, Colorado	1

How to interpret this hazard lens

Hazard categories normalize source labels into a shared taxonomy; source definitions and reporting practices still differ.
FEMA declarations reflect federal administrative actions and do not inventory every damaging local event.
NOAA totals include only distinct county-coded Storm Events records; forecast-zone and marine-zone records are excluded.
Only counties with a positive count for this category appear in each source table. Open a county profile for its complete source disclosures and preparedness context.