AP TELEVISION

Clearlake, California – August 5, 2015

1. Various of fire trucks, smoldering trees, burnt earth

2. SOUNDBITE (English) Steve Kaufmann, captain, public information officer, Ventura County Fire Department:

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"A lot of fire deep seeded that's just smoldering on the ground so what happens during the day, especially when the winds come up is those fires will start getting bigger and then we'll start seeing flames and the last few days expect for yesterday, we would see little spot fires grow out of those ones because the winds would carry the embers, so we'll definitely have to see what today brings us."

3 . Firefighters climbing hill

4 . SOUNDBITE (English) Steve Kaufmann, captain, public information officer, Ventura County Fire Department:

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"We expect the temperatures to go up and we expect the humidity to decrease substantially and that should dry out some of our vegetation fuel beds so I expect to see a little bit of increase in activity today."

5. Various of fire trucks, firefighters

6. SOUNDBITE (English) Steve Kaufmann, captain, public information officer, Ventura County Fire Department:

++SOUNDBITE COVERED BY PREVIOUS SHOT++

"If we have another good day, I expect to see some (containment) numbers increase and I definitely expect to see some numbers increase if we're able to hold those containment lines with the winds that we're expecting today."

FOR CLEAN VERSION SEE STORY NUMBER: apus035966

Cooler temperatures and higher humidity overnight helped thousands of firefighters battling an unruly Northern California wildfire, but officials worried that strong afternoon winds and hotter temperatures Wednesday could reignite portions of the blaze.

Firefighting officials said crews made progress with some help from light rain Tuesday, getting the fire less than a quarter contained. The blaze has charred 106 square miles, and isn't expected to be largely contained until at least Monday.

Much of the fire Wednesday morning was smoldering on the ground as firefighters positioned themselves around its perimeter in anticipation of possible flare-ups Wednesday afternoon while they continued to build containment lines aimed at corralling the blaze.

Fire spokesman Steve Kaufmann said the winds Wednesday afternoon would likely fuel the fire burning on the ground, spreading flames by carrying embers

"The last few days expect for yesterday, we would see little spot fires grow out of those ones because the winds would carry the embers, so we'll definitely have to see what today brings us," he said.

More than 3,000 firefighters are battling the smoky blaze.

The fire is burning about 110 miles north of San Francisco along rugged, parched terrain in Lake, Yolo and Colusa counties.

The cause of the fire is under investigation. Since it started last Wednesday, more than 13,000 people were required or urged to leave their homes, vacation cabins and campsites.

Teams on Tuesday were able to build a buffer between the flames and some of the estimated 6,900 homes it threatens. Despite the fire's growth, no additional homes were consumed outside the two dozen already destroyed.

The fire is by far the largest of 11 burning in Northern California.