Last night a fast-moving wildfire that began near Sylmar (just north of the city of L.A. ) spread overnight causing mass evacuations for Porter Ranch and Granada Hills residents.

The so-named Saddleridge Fire has already burned more than 4,700 acres and is still not contained.

“This is a very dynamic fire,” Los Angeles Fire Department Chief Ralph Terrazas said at a news conference Friday morning. “Do not wait to leave. If we ask you to evacuate, please evacuate.”

The Los Angeles Fire Department Chief Ralph Terrazas reports the fire is burning at a rate of 800 acres per hour.

‘As you can imagine the embers from the wind have been traveling a significant distance which causes another fire to start,’ he said.

Dozens of schools and universities were closed as well as many freeways.