The ferocious Santa Ana winds that helped fuel the deadly wildfires around Los Angeles are forecast to ease later Wednesday, but they may return.

Santa Ana winds return to Southern California from Monday to Tuesday, once again raising fire danger concerns.

Santa Ana winds in Southern California are often-fierce winds that topple power lines and trees and can turn a spark into a raging wildfire.

The Santa Anas are expected to be most powerful Monday night into Tuesday. Fire services across the region say they are ready.

By the time the winds get to the point where the Eaton Fire broke out in Altadena on Jan. 7, it’s not uncommon for them to have less than 5 percent relative humidity, meaning essentially no moisture at all.

The National Weather Service has issued another rare Particularly Dangerous Situation warning in anticipation of Monday's Santa Ana wind event.

Red flag warnings are in effect until Thursday for parts of Los Angeles, Ventura, San Diego, due to low humidity and an uptick in Santa Ana winds.

The winds will come and go, with the strongest gusts expected early next week, especially next Monday night and into Tuesday, forecasters said.

A rare Particularly Dangerous Situation warning has been issued for Southern California as a powerful and potentially damaging Santa Ana wind event​ is expected.

As wildfires continued to burn in Los Angeles, three fires broke out in San Diego County, prompting evacuation orders and warnings.

Katabatic winds? Adiabatic compression? Time for a thermodynamics lesson! The record lack of rain has also made this Santa Ana event different.