SkyGround

County-level natural hazard risk data for researchers

All counties

Los Angeles County, CA

Population: 10,005,712 · FIPS code: 06037

Very High Overall risk index: 100 / 100 (percentile among US counties)

Hazard breakdown

Hazard NRI rating NRI score NOAA events
(2016–2025)
Wildfire Very High 99.9 0
Inland Flooding Very High 100 87
Coastal Flooding Relatively High 90 0
Earthquake Very High 100 —
Heat Wave Relatively High 99.3 0
Tornado Relatively High 97.7 6

NOAA event counts are recorded county-level storm events from the NOAA Storm Events Database for 2016–2025. NOAA does not track earthquakes, and some hazard reports are filed by NWS forecast zone rather than county, so these counts are a partial, not exhaustive, record of recent activity. See the methodology page for details.

Federal disaster declaration history

Los Angeles County has been included in 88 federal disaster declarations between 1969 and 2025, most recently for Fire in 2025 (WILDFIRES AND STRAIGHT-LINE WINDS).

Source: FEMA OpenFEMA Disaster Declarations Summaries. Counts reflect county-level declaration records (a single disaster can produce more than one record per county), not modeled risk.

Geomagnetic latitude

Los Angeles County sits at approximately 40.4°N geomagnetic latitude. Aurora is rarely visible this far from the geomagnetic poles, even during the most severe (G5) geomagnetic storms — though historic extreme storms have occasionally been seen at unusually low latitudes. See current space weather conditions for live geomagnetic activity and aurora forecasts.

Geomagnetic latitude is an approximate dipole-model calculation based on this county's geographic centroid (US Census Bureau). See the methodology page for details and limitations.

What these ratings mean

Each score reflects how Los Angeles County's expected losses from that hazard compare to every other county in the country, based on FEMA's National Risk Index. A "Very High" rating means this county is among the most exposed in the US for that hazard relative to other counties — it does not mean a disaster is likely this year. See the methodology page for how these scores are calculated.