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

Red flag warnings tell other agencies, like fire and transportation departments, that it's time to staff up and prepare to respond to fast-moving fires. But they're also intended to put the public on ...

A red flag warning for critical fire danger, due to strong winds and low humidity, will remain in effect until 6 p.m.

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