A man photographs Downtown San Francisco in Dolores Park under an orange sky darkened by smoke from California wildfires in San Francisco, California, U.S. September 9, 2020. The wildfires burning in California turned San Francisco's sky a hazy shade of orange on Wednesday (September 9). REUTERS/Stephen Lam

The Bay Bridge is seen under an orange sky darkened by the smoke from California wildfires in San Francisco, California, U.S., September 9, 2020. The fires have burned through more than two million acres, destroyed numerous properties and forced the evacuation of thousands of people from their homes. REUTERS/Stephen Lam

The Transamerica Pyramid is seen under an orange sky darkened by the smoke from California wildfires in San Francisco, California, U.S., September 9, 2020. REUTERS/Stephen Lam

Downtown San Francisco is seen from Dolores Park under an orange sky darkened by smoke from California wildfires in San Francisco, California, U.S. September 9, 2020. REUTERS/Stephen Lam

Singer Matt Jaffe films a music video by the Golden Gate Bridge under fog and tinted by the smoke from California wildfires in San Francisco, California, U.S., September 9, 2020. REUTERS/Stephen Lam

A man walks along the Redwood highway by the Pacific Ocean coast as smoke from wildfires covers an area near Orick, California, U.S., September 9, 2020. REUTERS/Carlos Barria