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

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

As firefighters struggle to gain control of massive and deadly wildfires that are raging across parts of the Los Angeles area ...

Here's a guide to understanding "particularly dangerous situation" red flag warnings, containment, and other terms related to ...

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

The National Weather Service has issued a Red Flag waning for a wide swath of Southern California as Santa Ana winds are ...