Now 1,000
http://www.sfgate.com/bayarea/article/Incredibly-fast-Valley-Fire-grows-quickly-6501998.php
The pictures at that link looks like they were hit by a nuke.
“The pines were exploding. The flames were close to the highway, and they were huge,” Ron Clark said. “It was unbelievable. I’ve never seen anything like it. By then it was get out or get burned. If we hadn’t left when we did, this story wouldn’t be told.”
“The rate at which the fire spread, jumping from 400 acres around 1:30 p.m. Saturday to 50,000 acres by Sunday, was astonishing, said Veronica Barclay, a spokeswoman for the California Department of Forestry and Fire Protection.”