Data Sources
County briefings and maps draw on the organizations and services below. We pull updates from these sources several times a day for each county, and we run a scheduled early-morning refresh so the day starts with current data even when no one has visited yet. We do not publish API keys or other credentials on this page.
- National Weather Service (NWS) at weather.gov
- CAL FIRE at fire.ca.gov
- AirNow (U.S. EPA) at airnow.gov
- PG&E at pge.com for public safety power shutoff and outage references
- Official county and city emergency pages, linked per county where we have them (for example sheriff, OEM, Cal Alerts).
- Local Fire Safe Councils, from each council's published contact and website information.
- Watch Duty at app.watchduty.org
- OpenStreetMap and Leaflet for map display
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