'Horrific' Caldor Fire forces South Lake Tahoe residents to evacuate

California's Caldor Fire forced tens of thousands of people to flee South Lake Tahoe on Monday, an extreme weather disaster that experts said provides further evidence of the need to rapidly slash greenhouse gas emissions and transition to clean energy.

The Caldor Fire, one of 83 large blazes currently torching the U.S. West, has burned more than 191,000 acres and is just 16% contained. The rapid growth of the fire, which began on August 14, prompted more evacuation warnings over the weekend, and those were soon upgraded to evacuation orders.

While "nearly 30,000 residents had already been evacuated from the eastern half of El Dorado County," The Sacramento Beereported that "the entire city of South Lake Tahoe and surrounding areas along the west and south shores were ordered to evacuate" on Monday morning, just hours before the Caldor Fire entered the Lake Tahoe Basin.

Most South Lake Tahoe evacuees were on the road by 11:00 am PT on Monday, according to the newspaper, "with stragglers rushing to get their belongings into vehicles."

"Police drove through residential areas, using loudspeakers and sirens to order people to leave and directing them to head north on heavily congested Highway 50, along the east shore of Tahoe, as the main route out of town," The Sacramento Bee reported.

Jason Pohl, a journalist at the newspaper, called the miles of standstill traffic "an emergency manager's nightmare."

Hours after almost all of South Lake Tahoe's roughly 22,000 residents fled, "the fire pushed beyond Echo Summit and into Christmas Valley, a few miles south of the city, intensifying fears about the danger to populated areas along the south shore of the lake," The Sacramento Bee noted.

By Monday evening, flames had jumped Highway 88 and Highway 89, according to reporters at the newspaper, who added Tuesday that "winds and critically dry conditions could continue to push the Caldor Fire deeper into the basin." The fire, which has already destroyed close to 500 homes, is now threatening approximately 34,000 buildings.

Both California Gov. Gavin Newsom (D) and Nevada Gov. Steve Sisolak (D) declared states of emergency on Monday, as officials worry that flames from the Caldor Fire could cross state lines in the coming days. In addition, the U.S. Forest Service is closing all national forests in California from Tuesday night through at least September 17 as a precautionary measure.

University of California, Los Angeles climate scientist Park Williams told the New York Times earlier this summer that "we wouldn't be seeing this giant ramp up in fire activity as fast as it is happening without climate change."

As a result of the U.S. West's worsening drought and record-shattering heatwaves—just some of the extreme weather that scientists have linked to carbon pollution—very dry fuel is abundant throughout the region. The combination of low precipitation and high temperatures has created the conditions for an especially catastrophic wildfire season that experts warn is not over.

"Wildfire season in the West is still producing horrific scenes daily," said meteorologist Eric Holthaus. "Due to climate warming, wildfires are burning higher up mountains than ever before."

"Earlier this summer, the Dixie Fire—now the largest single fire in California history—became the first wildfire in recorded history to cross the crest of the Sierra mountain range," Holthaus continued. Just a few weeks later, the Caldor Fire became the second blaze to make it from one side of the Sierra Nevada to the other.

California's Office of Emergency Services, meanwhile, lost access to a Louisiana National Guard helicopter crew that had arrived last week to help contain the fire but was forced to return home to respond to Hurricane Ida.

"We are in a climate emergency," said Holthaus.

The Sierra-at-Tahoe ski resort, Holthaus noted, used snowmaking equipment in an attempt to slow the spread of the Caldor Fire, which is 60 times bigger than the 2007 Angora Fire, previously the worst fire in the Lake Tahoe area.

Monday's evacuation of South Lake Tahoe coincided with the beginning of search and rescue efforts in Louisiana, after Hurricane Ida left more than one million people without power, possibly for weeks.

In response, environmental justice advocates urged President Joe Biden to take serious steps to confront the fossil fuel-driven climate crisis.

"What more do politicians need to realize that the climate crisis is here and killing us?" asked Varshini Prakash, executive director of the Sunrise Movement. "The time for incrementalism and watered down 'solutions' is over."

"Biden must declare a climate emergency to mobilize the federal government towards addressing these climate disasters and tackling the climate crisis head on," Prakash added.