When the air is warm and dry, transpiration and evaporation also suck water out of the plants and soil. That leaves dry vegetation that can provide fuel for flying embers to spread wildfires, as the Los Angeles area saw in early January.

Major fires across Los Angeles this week have killed at least five people, forced 180,000 to flee their homes, and destroyed thousands of structures

Los Angeles is reeling from the most destructive wildfires in its history, and firefighters are struggling to contain the devastating blaze.

As fires spread across Southern California, Trump urged Newsom to send in water from Northern California despite some experts saying water supply is not the problem.