Millions of Southern Californians were on edge as winds began picking up during a final round of dangerous fire weather forecast for the region Wednesday where two massive blazes have killed at least 25 and destroyed thousands of homes.

Firefighters around Los Angeles were preparing on Tuesday to attack flare-ups or new blazes. The National Weather Service issued a rare warning that dry winds combined with severely dry conditions created a “ particularly dangerous situation,

Firefighters held the line against two massive wildfires that have ravaged parts of Los Angeles for the past week, even as desert winds and a parched landscape presented extremely hazardous conditions.