Smoke from the Caldor Fire and other spot fires in the Sierra Nevada brought air quality around Lake Tahoe to hazardous levels, including the worst air rating in the U.S. one day and the worst in the world the next day, according to reports.
The air quality index on Wednesday morning showed a reading of 530 for the Tahoe region, by far the worst on the planet, according to Purple Air.
On Tuesday, Tahoe Vista, a census-designated area along the north shore of Lake Tahoe, had an air quality index rating of 448, the worst in the U.S. and 42 times above the World Health Organization’s exposure recommendation, according to the Los Angeles Times.
The Caldor Fire on Tuesday became the main focus of firefighters across the state as it approached the Tahoe basin. The fast moving wildfire had scorched about 126,000 acres and was just 11% contained as of Wednesday morning, according to Cal Fire.
Smoke from several fires burning in Northern California prompted an air quality advisory for several consecutive days in the Bay Area as well as Spare the Air alerts at the end of last week.