>> Smoke clouding the skies of Los Angeles in what has become the largest wildfire in the city's history. The La Tuna fire erupted Friday and grew to 7,000 acres by Monday, destroying at least four homes. Los Angeles Mayor Eric Garcetti.>> This is an island of vegetation that hadn't burned in 45, some cases 80 years.
So this fuel had been waiting year after year after year.>> The more than 1,000 firefighters battling the blaze got some help on Sunday with a smattering of rain and easing temperatures. But county supervisor Catherine Barger warns that danger remains.>> Today we had a heavy downpour and there was a flash flood warning for our firefighters up there that are fighting the fires.
And it's a reminder that it's not over.>> Resident Ruben Contreras is watching cautiously.>> The house is all wood. It don't take one spark, and then, goodbye house.>> Officials say the blaze is 30% contained, but that's not enough for Contreras to let his guard down. The fire has its own power.
And if the wind picks up, that's it, you're in trouble.