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 weather warning: A National Weather Service alert that warns the public — especially fire officials and firefighters — that strong winds are expected in specific areas of Southern California, and that there will be potentially dangerous fire weather conditions within the next 12 to 24 hours.

The most destructive wildfires in Los Angeles history Thursday have burned more than 54 square miles of land, destroyed thousands of structures and killed at least five people.

A Red Flag Warning has been extended for portions of San Diego County ahead of another bout of strong Santa Ana winds.

The National Weather Service on Wednesday extended the wildfire warning through the end of the week for much of East County.

Amid an already dry winter season, the first Santa Ana wind event of 2025 is elevating fire danger this week and threatening power shut-offs for thousands of San Diego Gas & Electric customers.

ABC 10News reporter Moses Small reported live from Alpine, where wind gusts could reach 75 miles per hour in the next couple of days, elevating the fire risk for San Diego County.

San Diego Gas & Electric began restoring power Thursday to customers placed under a public safety power shutoff, allaying the worries of some in high fire-risk areas even as conditions are expected to remain critical through the end of the week.

In San Diego, the Red Flag Warning for inland and mountain communities has been extended until at least 6 p.m. Friday, so our county remains on high alert due to the elevated fire risk. ABC 10News is bringing you extensive coverage on both the Los Angeles fires and how our area is preparing for the worst in this edition of the Wake Up Call newsletter.