Smoke from Canadian wildfires is working its way into the northern U.S. this week, prompting warnings from health officials ...

CalHeatScore is developed by the California Environmental Protection Agency’s Office of Environmental Health Hazard ...

SACRAMENTO, Calif — California has launched a new rating system to help people prepare for extreme heat events in the state, ...

Air quality in some parts of the United States is being compromised as smoke from dozens of wildfires in Canada travels south, pushed by winds high in the atmosphere ...

The injunction seeks court intervention to mandate urgent relief measures, including relocation assistance and home-hardening ...

Federal action revokes California's emissions authority, but CARB insists the Clean Truck Partnership (CTP) with OEMs holds.