Officials say the fire is burning at a rapid rate of spread. It's caused a portion of the 71 freeway to close as of the afternoon.

A brush fire broke out Wednesday in Chino Hills, burning more than 100 acres on a hillside just off the 71 Freeway.

The California Highway Patrol said all lanes of the 71 Freeway were closed at the Euclid Avenue onramp in Chino Hills. Chino Valley Fire said it was on the scene by 2:39 p.m.