Red flag criteria is generally when relative humidity is at 15% or less, combined with sustained winds and/or gusts of 25 mph ...

The National Weather Service issued a Red Flag Warning starting Monday for San Diego County's inland valleys and mountains.

"If fire ignition occurs, conditions are favorable for very rapid fire spread and extreme fire behavior," the NWS warns.

Californians in the greater Los Angeles area have been on edge due to high winds and dry conditions. The Palisades and Eaton ...

The latest red flag warning includes the Inland Empire and Orange County, as well as the already ravaged Los Angeles area.