Los Angeles Fire Department Chief Kristin Crowley said Tuesday that “life-threatening and destructive and widespread winds” are in the region, which could fuel the growth of new or existing wildfires in Los Angeles County and Ventura County.

The Eaton Fire burning just north of Los Angeles and the Palisades Fire that destroyed much of the seaside LA neighborhood of Pacific Palisades broke out Jan. 7 in conditions similar to what’s expected Wednesday. High winds last week pushed flames at remarkable speed and carried fire-sparking embers sometimes miles away.

Los Angeles residents who fled devastating wildfires are facing a huge rebuilding effort, as they gather what they can from ruins that were once their homes.

Firefighters raced to contain the frontiers of two Los Angeles wildfires that burned for the sixth straight day on Sunday, taking advantage of a brief respite in hazardous conditions before high winds were expected to fan the flames anew.

Millions of Southern Californians were on edge as a final round of dangerous fire weather was forecast for the region on Wednesday, along with a rare warning of a “Particularly Dangerous Situation” for an area near where two massive blazes have killed at least 25 and destroyed thousands of homes.

Trying to estimate when the wildfires will be contained is largely guesswork. Yet the foremost factors are clear: wind and rain, or the lack thereof.