More than 800 homes, ranging from multi-million dollar mansions, to smaller mobile homes, were destroyed.
Aerial shots of one of the wildfires
No-one knows for sure what caused the fires, but it's thought they could have been started by people being careless - or even a bolt lightening.
No deaths were reported, but a state of emergency was declared in four areas around southern California, so officials can get more money to help those affected by the fires.