The National Oceanic and Atmospheric Administration shared satellite images of thick smoke over California this week.
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They show the smoke drifting from Oregon, heading south into California and through the San Francisco Bay Area over a two day period, starting on Sept. 9.
The NOAA also shared Thursday's view of the large smoke layer along the U.S. Pacific Coast.
RELATED: Orange, smoky skies and Bay Area air quality may not improve for days
Smoke and ash from multiple fires have contributed to a strange orange glow in the Bay Area and poor air quality.
BEFORE AND AFTER: DRONEVIEW7 captures transition to orange SF skies
BEFORE AND AFTER: DRONEVIEW7 captures transition to orange SF skies
A Spare the Air alert is in effect in the Bay Area through at least Friday, September 11.
RELATED: Spare the Air Alert in effect for Bay Area through Friday
Track air quality levels where you live with the interactive map below.
App users: For a better experience, click here to view the full map in a new window
When a Spare the Air Alert is called, outdoor exercise should be done only in the early morning hours when ozone concentrations are lower. Residents are encouraged to reduce air pollution every day by rethinking their commute and avoiding driving alone.
Track wildfires across San Francisco Bay Area, other parts of California with this interactive map
App users: For a better experience, click here to view the full map in a new window
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