As of Thursday morning, the Ventura County Fire Department estimated the fire had burned 14,500 acres and was 0% contained, with at least 800 firefighters were on the scene. By midday Thursday, Cal Fire put the size of the blaze at 19,643 acres.

It’s unclear how many homes have been destroyed by the Mountain Fire. Officials said they plan to send out damage assessment support teams who will be going door-to-door in the communities impacted by the fire.