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, ...

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.

“The pollution in the Tijuana River isn’t just harming our environment – it’s threatening our neighbors’ health, shutting ...

The 120-mile Tijuana River flows from Baja California into the United States and discharges millions of gallons of wastewater ...

Newsom’s executive order allows fire reduction efforts to bypass CEQA ahead of fire season. Some fire agencies are seeking to ...

Noé Crespo, a professor of public health at San Diego State University, was on the verge of cracking a question he had spent ...

House Republicans released a list of regulations in February that they seek to overturn using the Congressional Review Act.

Here’s what journalists need to know about this burgeoning market — plus, five big questions to start digging into.

A study by UC San Diego researchers reveals that pollutants found in the sewage-laden Tijuana River are ending up in the air ...