Two more cases of the New World screwworm have been confirmed in Texas, demonstrating the difficulty of stopping the spread of a pest that potentially could devestate the nation’s cattle industry

Tropical Storm Boris has formed and is expected to bring heavy rain to parts of southern Mexico’s Pacific coast

So far this year, the South Coast air basin, which includes Los Angeles, Orange, Riverside and San Bernardino counties, has seen 39 days when the concentration of lung-irritating ozone exceeded the federal standard, according to preliminary state air quality data.

The Pacifica Municpal Pier was abruptly closed Thursday after city workers found cracks and missing concrete. It’s one more coastal landmark that has begun to crumble as the ocean slowly rises around it.

State and federal fire officials have unveiled a new plan to boost wildfire prevention, even as California funding sources are drying up.

A destructive wildfire burned through a third of Santa Rosa Island. For one reporter, the loss isn’t theoretical — it’s a personal reckoning with a changing paradise.

California cities are paying high costs to clean up water pollution running off parking lots. Environmental groups say the state needs to hold businesses accountable.

The president said he will invoke Cold War-era emergency powers to direct a nearly $700-million investment into the waning coal industry, including construction of a West Coast coal export terminal in Oakland.

After the Eaton and Palisades fires devastated Southern California, a highly toxic metal stayed in the air much longer and probably traveled much farther than expected, according to a new study.

A new dashboard makes public for the first time heat-related deaths and emergency room visits in near-real time.