A late-season storm system is expected to affect most of Southern California, bringing light to moderate rain.

A late-season snowstorm is expected to drop up to 7 inches of snow to some Southern California mountains this weekend.

Once thought resistant to invasion, California's deserts are losing native plants to aggressive weedy species like Saharan mustard. New research shows its spread is disrupting biodiversity and ...

Weather patterns, construction activity and wildfires can all play a role in outbreaks of Valley fever, caused by inhaling a ...