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.

There is great concern that fire weather conditions could become exacerbated' again for Los Angeles County. Three Santa Ana wind events are possible next week.

The red-flag warning extended Wednesday for the county’s inland valleys still is set to expire at 6 p.m. Friday, with overnight northeast winds of 28 to 38 mph and possible gusts of 50 mph, up to 60 mph after midnight.