A watch means the ingredients are there for severe weather. A warning means it is happening. But there are differences based on weather type.

PG&E’s meteorology department is forecasting a heat wave approaching our service area starting on Thursday and lasting into the early weekend. In parts of the North Valley and Sierra Region, ...

Weather hazard maps have nearly 100 colors including six variations of red, a "bisque," "moccasin," cornflower blue, and Dodger blue. Experts are working to simplify the alerts.