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The Latest – Wednesday, Aug. 18:

The National Weather Service said the Red Flag Warning has been extended through Thursday at 8 p.m.

Original story below:

(KTXL) — The National Weather Service has placed most of Northern California under a Red Flag Warning as wildfires burn out of control amid windy, dry weather.

Portions of the Sacramento Valley, the foothills, and the Sierras up and down Northern and Central California are under the warning, which will be in place Tuesday at 1 p.m. through Wednesday around 8 p.m.

The NWS is expecting wind gusts of 25 to 35 mph starting Tuesday night through Wednesday. Low humidity is also in the forecast.

“Then winds will shift to the north to northeast and increase Tuesday evening across much of the Sacramento Valley, surrounding terrain, and western slopes of the Sierra Nevada and will continue through Wednesday,” the NWS warning reads.

Paired with the state’s dire drought conditions, the weather is expected to drive the flames already devastating the state and could help spark and spread new fires.

The air quality is also expected to worsen.

Pacific Gas and Electric has told roughly 48,000 of its customers to prepare for possible power shutoffs Tuesday through Wednesday due to the weather and dry conditions.