Southern California is burning. The state’s worst fire season on record won’t let up.

Several fires are raging near some of the most densely populated counties in the US.

Towering flames are roared through teeming urban counties in Southern California on Wednesday morning, scorching hillsides and shrouding highways in smoke in what is already the state’s worst fire season ever.

California Gov. Jerry Brown declared a state of emergency Tuesday as the California Department of Forestry and Fire Protection reported five uncontained fires as of Wednesday morning across Ventura County, home to 850,000, and Los Angeles County, with more than 10 million residents.

You can see the locations of the fires in this map from the Los Angeles Times:

The fires have already forced more than 100,000 people from across the region to flee as embers skipped across highways, making a hellish commute for Angelinos.

Hundreds of schools in the region closed down to because of the flames and the University of California Los Angeles canceled classes Wednesday afternoon.

One blaze, the Creek Fire near Sylmar, has already burned through 11,000 acres since it ignited in the darkness Tuesday morning, triggering evacuation orders affecting more than 120,000 people.

Meanwhile, the Thomas Fire in Ventura has forced 27,000 people to flee after consuming 55,000 acres and 150 structures.

Further north, 1,200 homes were evacuated as the Rye Fire torched 5,000 acres.

And the Little Mountain Fire in San Bernardino spread more than 100 acres as of Tuesday.

Firefighters are also working to contain the Riverdale Fire, which scorched 40 acres after it was ignited Monday afternoon by a man fleeing from Riverside County sheriff’s deputies.

But new fires are still igniting. Flames from the Skirball Fire swiftly engulfed 150 acres near Sepulveda Pass Wednesday morning, shutting down the 405 freeway and threatening multimillion-dollar homes in Bel Air.

Unusually stiff seasonal Santa Ana winds with gusts reaching 70 mph are driving the flames of the active fires over hills and through dry brush, making it harder for the more than 1,000 deployed firefighters to contain the blazes.

This devastation has been years in the making, as Californians have kept building homes in high-risk areas. Meanwhile, record heat this summer following a wet winter left much of the state buried in dry kindling.

And there’s no relief in sight — the National Weather Service is reporting “extreme fire danger” through Thursday for the Los Angeles area from the longest and strongest Santa Ana winds so far this season, spreading fires to new areas and putting more people at risk.

These blazes are coming after tens of thousands of Californians fled flames and smoke from the deadly record wine country fires in the Northern part of the state last month. The United States as a whole has suffered the second-worst fire season on record, with more than 9.1 million acres burned this year so far.

Thick plumes of smoke from this week’s vast blazes wafted over the Pacific Ocean casting a pall large enough for a NASA satellite to see.