"The fire's kinda moving around in a lot of weird places, it's not a typical line of fire," said Rancho Cucamonga Fire Chief Mike Bell.
Ryan Michaels of Fresno County Cal Fire says a strike team left as early as Tuesday at the first red flag warning.
"Basically we're mobilizing to support the operation," he said.
More engines and hand crews headed down as the wildfire quickly grew from 20 acres when it first started to 200 acres within hours.
"As they're traveling down, depending on the severity...they're go directly to the fire line," said Michaels.
Fresno and Tulare firefighters are assisting more than 500 firefighters on the fire line, trying to contain a blaze fanned by up to 80 mile per hour winds.
More than 1600 homes were evacuated at one point."There's been fires that have come close, but they've never evacuated us," said Rancho Cucamonga Resident Tammy Flanders.
Last June, local crews battled a wind-whipped blaze in Fresno off Clinton and Highland.
Trees in that neighborhood are still damaged.
The fire caught residents there off guard, and crews are using this massive Spring blaze as a reminder to residents...prepare your house and yourself for a serious fire season."To have these type of events this early into april...could show the potential for the remainder of the summer," said Michaels.