The city by the Bay is resembling a city on Mars.

The skies over the San Francisco Bay Area on Wednesday glowed orange as wildfires raging across California are pumping thick smoke into the air.

The National Weather Service (NWS) forecast office for the Bay Area said that suspended smoke will descend  closer to the surface, which could "lead to darker skies and worsening air quality."

CALIFORNIA FIREFIGHTERS BATTLING WILDFIRE FACE GUSTY WINDS, SMOKE DUST DEVILS

"Unprecedented amount of smoke in the atmosphere as a record number of acres burn across California & the West," the NWS tweeted.

A massive cloud of smoke covered much of California on Wednesday, dimming the sun to an eerie orange glow over San Francisco.

Patrick Kenefick, left, and Dana Williams, both of Mill Valley, Calif., record the darkened Golden Gate Bridge covered with smoke from wildfires Wednesday, Sept. 9, 2020, from a pier at Fort Baker near Sausalito, Calif. The photo was taken at 9:47 a.m. in the morning.

Patrick Kenefick, left, and Dana Williams, both of Mill Valley, Calif., record the darkened Golden Gate Bridge covered with smoke from wildfires Wednesday, Sept. 9, 2020, from a pier at Fort Baker near Sausalito, Calif. The photo was taken at 9:47 a.m. in the morning. (AP Photo/Eric Risberg)

"Extremely dense & tall smoke plumes from numerous large wildfires, some of which have been generating nocturnal pyrocumulunimbus clouds ('fire thunderstorms), are almost completely blocking out the sun across some portions of Northern California this morning," UCLA climate scientist Daniel Swain wrote on Twitter.

The Bay Area Air District said in series of tweets that strong winds over the past few days transported ash from fires in northern California and the Sierra Nevada into the region.

A woman crosses a street by in front of a hotel as smoke from wildfires darken the morning sky Wednesday, Sept. 9, 2020, in Sausalito, Calif.

A woman crosses a street by in front of a hotel as smoke from wildfires darken the morning sky Wednesday, Sept. 9, 2020, in Sausalito, Calif. (AP Photo/Eric Risberg)

"These smoke particles scatter blue light & only allow yellow-orange-red light to reach the surface, causing skies to look orange," the agency said. "If smoke becomes too thick in a certain area, most of the light will be scattered & absorbed before reaching the surface, which may cause dark skies."

People look toward the skyline obscured by wildfire smoke in daytime from Kite Hill Open Space in San Francisco, Wednesday, Sept. 9, 2020.

People look toward the skyline obscured by wildfire smoke in daytime from Kite Hill Open Space in San Francisco, Wednesday, Sept. 9, 2020. (AP Photo/Jeff Chiu)

Photos from around the Bay Area showed wildfire smoke obscuring the sky.

San Francisco City Hall is shrouded in smoke from multiple wildfires burning in the Sierra Nevada and Coast Ranges of Northern California, Wednesday morning, Sept. 9, 2020.

San Francisco City Hall is shrouded in smoke from multiple wildfires burning in the Sierra Nevada and Coast Ranges of Northern California, Wednesday morning, Sept. 9, 2020. (AP Photo/Olga Rodriguez)

Many cars were driving around with headlights, and office towers had their lights on.

CALIFORNIA AND OREGON WILDFIRES SPOTTED FROM SPACE IN INCREDIBLE SATELLITE PICTURES

The Air District extended a "Spare the Air Alert" through Wednesday due to the smoke in the air.

People look toward the skyline obscured by wildfire smoke during daytime from Kite Hill Open Space in San Francisco, Wednesday, Sept. 9, 2020.

People look toward the skyline obscured by wildfire smoke during daytime from Kite Hill Open Space in San Francisco, Wednesday, Sept. 9, 2020. (AP Photo/Jeff Chiu)

“The Labor Day weekend heatwave, combined with tailpipe exhaust and lingering wildfire smoke, is expected to cause unhealthy air quality in the region,” Jack Broadbent, executive officer of the Air District, said in a statement. “Driving less can help reduce smog and heading indoors when smoke is present can help protect our health.”

Wildfire smoke obscures the sky in the morning over San Francisco, Wednesday, Sept. 9, 2020.

Wildfire smoke obscures the sky in the morning over San Francisco, Wednesday, Sept. 9, 2020. (AP Photo/Jeff Chiu)

On Tuesday, the Bay Area hit a new record of 22 consecutive days of Spare the Air alerts due to the smoke from the blazes since August, KTVU reported.

CLICK HERE FOR MORE WEATHER COVERAGE FROM FOX NEWS

The worst air quality readings were in Napa, Concord, Livermore, Pleasanton, Gilroy, and San Jose. Those areas had unhealthy levels for sensitive groups for most of the day and at times were hazardous.

A man walks along Bridgeway Avenue and looks out at the darkened morning sky with smoke from wildfires Wednesday, Sept. 9, 2020, in Sausalito, Calif.

A man walks along Bridgeway Avenue and looks out at the darkened morning sky with smoke from wildfires Wednesday, Sept. 9, 2020, in Sausalito, Calif. (AP Photo/Eric Risberg)

Photos and videos posted to Twitter show the extent of the orange skies throughout the region.

More than 14,000 firefighters are battling fires in California. Two of the three largest blazes in state history are burning in the San Francisco Bay Area, though they are largely contained after burning for three weeks.

Winds have fanned a huge fire in the Sierra Nevada foothills and forced authorities to order early morning evacuations and warn other residents to be ready to leave.

CLICK HERE FOR THE FOX NEWS APP

The state has set a record with nearly 2.3 million acres burned this year and the worst part of the wildfire season is only beginning.

“It’s extraordinary, the challenge that we’ve faced so far this season,” Gov. Gavin Newsom said on Tuesday.

The Associated Press contributed to this report.