The Caldor Fire is forcing thousands of people to rush to leave South Lake Tahoe as the entire tourist city comes under evacuation orders.
The wildfire is headed straight toward Lake Tahoe, a large freshwater lake on the California-Nevada border. The area is popular year-round for outdoor activities, as well as casino gambling on the Nevada side.
Evacuation warnings issued for the city of South Lake Tahoe on Sunday turned into orders Monday.
There were so many vehicles trying to leave the area on Highway 50 that traffic came to a standstill.
Other communities several miles south of the lake were abruptly ordered evacuated over the weekend.
The huge Caldor Fire has grown to 177,260 acres and is just 14% contained as of Monday morning.
Forecasters are warning of critical fire weather through Tuesday, and fire officials say embers from the fire are traveling up to half a mile away.
WATCH: State, federal officials provide update on statewide wildfires
The Caldor Fire started on August 14, south of the community of Grizzly Flats in El Dorado County. It has destroyed 472 structures and more than 20,000 remain threatened.
More than 3,600 firefighters are battling the fire.
The cause is unknown.
For the latest updates and evacuation order details, click here.