A red flag warning for critical fire danger, due to strong winds and low humidity, will remain in effect until 6 p.m. Wednesday for the San Diego County mountains and inland valleys.

The National Weather Service issued red flag warnings for severe fire conditions. Winds could reach 65 mph, the NWS warned. NewsNation senior national correspondent Brian Entin shares the latest details.

Here's a guide to understanding "particularly dangerous situation" red flag warnings, containment, and other terms related to the devastating fires that have left much of the LA area in ruins.

Red flag criteria is generally when relative humidity is at 15% or less, combined with sustained winds and/or gusts of 25 mph or greater. Both of these conditions must occur simultaneously for at least 3 hours in a 12 hour period, according to the NWS.

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 high alert.

As firefighters struggle to gain control of massive and deadly wildfires that are raging across parts of the Los Angeles area, the region is once again bracing for the potential of new fires and for current ones to intensify as a new storm system heads for the state.

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

The conditions that could impact the fires in LA County. Posted: January 14, 2025 \| Last updated: January 14, 2025. Red Flag Warning \| The conditions that could