Orange Skies Day

2020 San Francisco Orange Skies Day
Smoke from the North Complex Fire mixed with fog to create an orange hue in the sky
DateSeptember 9, 2020 (2020-09-09)
LocationBay Area, California, United States
CauseSmoke from the North Complex Fire

Orange Skies Day was a climatological event that occurred in the San Francisco Bay Area on September 9, 2020.[1][2]

The orange-colored hue in the sky was the result of smoke from the North Complex Fire (including the Bear Fire) and more than 20 other wildfires, which burned more than 2 million acres east of the San Francisco Bay Area.[3] This smoke scattered blue light wavelengths, which only allowed warmer colors to reach the Earth's surface.[4]

  1. ^ Hartlaub, Peter. "The orange skies have faded. But Orange Skies Day is forever". San Francisco Chronicle. Archived from the original on March 24, 2023. Retrieved March 24, 2023.
  2. ^ Rexroat, Kelsey (April 20, 2021). "The Day the San Francisco Sky Turned Orange". New Yorker. Archived from the original on March 24, 2023. Retrieved March 24, 2023.
  3. ^ Fuller, Thomas (September 9, 2020). "Wildfires Blot Out Sun in the Bay Area". New York Times. Archived from the original on March 24, 2023. Retrieved March 24, 2023.
  4. ^ "Remembering the day smoke-choked skies cast an eerie dark orange glow over Bay Area". CBS News. September 9, 2022. Archived from the original on March 24, 2023. Retrieved March 24, 2023.