Many Bay Area residents are waking up to hazy skies and deteriorating air quality as smoke from the Caldor Fire drifts into the region.
In anticipation of the oncoming smog, the Bay Area Air Quality Management District on Wednesday issued an air quality advisory for Thursday and Friday.
The agency said pollution levels are not expected to exceed federal health standards and prompt a Spare the Air Alert, though smoke may mix to the surface at times and cause isolated pockets of elevated pollution levels.
The agency expected levels to remain in the good to moderate range over the next two days. However, readings as of 10 a.m. Thursday indicated that most of the Bay Area was shrouded in the "orange tier" on the air quality index, meaning the air was "unhealthy for sensitive groups."
According to Purple Air, air quality in large portions, if not all, of the East, North and South Bay fell under the orange classification. San Francisco was the only area mostly under moderate conditions, the next safest category.
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