Active AlertsRedwood Valley, CA

What: Moderate to Major HeatRisk expected.
Where: Lake County, and Southeastern Interior Mendocino.
When: From noon Thursday to 10 PM PDT Friday.
Impacts: Hot temperatures and high humidity may cause heat illnesses especially for those without cooling or hydration.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.