A heat-health risk score from 0 (low) to 4 (severe) for each ZIP code today, plus a seven-day outlook.
Published by CalEPA CalHeatScore
Updates Every morning. The site checks for new data every 30 minutes while the page is open.
Keep in mind A ZIP-wide score does not tell you your personal risk or the temperature on your street. The expected high air temperature near the place you select; in the evening, it shows tomorrow’s high.
Published by National Weather Service
Updates Forecasts change as the National Weather Service issues them; the site refreshes its saved forecast about once an hour.
Keep in mind This is a forecast, not a thermometer reading at your exact location. Which ZIP areas may face greater health risks from heat, based on past illness, health, and community conditions.
Published by CDC Heat & Health Index (2024)
Updates A saved copy of the published 2024 CDC index, not live weather data.
Keep in mind Low, Moderate, and High are this site’s groups of CDC scores, not official CDC tier names; ZIPs without data stay unrated. How hot roofs, roads, and ground were on clear summer days, measured by satellite in late morning.
Published by USGS Landsat 8 & 9, summer 2025 (late-morning passes)
Updates The map uses a fixed summer 2025 snapshot, not today’s readings or an automatic yearly update.
Keep in mind Surface temperature is not the same as air temperature. Areas where brush, hills, and typical weather create Moderate, High, or Very High long-term fire hazard.
Published by CAL FIRE (state areas 2024, local areas 2025)
Updates Official maps change every few years. This site uses state-area maps from 2024 and local-area maps from 2025, and refreshes its saved map daily.
Keep in mind Fire zones do not show active fires, evacuation orders, or today’s fire danger. Public places where you can cool off, including regular centers and extra sites opened during heat events.
Published by LA County OEM · City of LA Recreation and Parks
Updates Regular sites come from a saved list; extra centers are checked on page load and about every ten minutes while the page is open. Officials update openings as needed.
Keep in mind Hours and openings can change; call the center or 211 before you go. Shelters listed by local officials during an emergency.
Published by LA County and City of LA emergency maps
Updates Officials update sites during emergencies. The site checks the feeds on page load and about every ten minutes while the page is open.
Keep in mind A missing marker does not prove that no shelter is open; check official emergency alerts. Public drinking-water stations, including stations inside buildings.
Published by City of LA (2022 list)
Updates A fixed City of LA list from 2022, not a live check of water availability.
Keep in mind A station may be closed or not working, and indoor stations depend on building hours. Outlines of the featured neighborhoods, so you can select an area on the map.
Published by LA Times Mapping L.A.
Updates Fixed neighborhood boundaries, not a live feed.
Keep in mind These outlines are not legal property boundaries or emergency evacuation zones.