https://www.mercurynews.com/2021/08/15/smoky-skies-expected-monday-as-smoke-from-california-wildfires-descends-on-bay-area/

SAN FRANCISCO — Smoke from the massive wildfires burning across Northern California is expected to bring hazy skies to the Bay Area for the fifth day in a row on Monday, air quality officials said.

As blazes like the Dixie Fire in Northern California and several others in Southern Oregon continue to burn in the dry summer heat, much of the American west has been engulfed in smoky skies. Wind patterns have kept skies clear in the Bay Area for several weeks, but since Thursday the coastal mountain ranges have become faint outlines under a thick gray haze as winds bring wildfire smoke in.