AirNow's air quality map shows some parts under a hazardous label and others in the unhealthy range.
The Bay Area Air District said it may extend the Spare the Air Alert through Sunday. Officials said that the decision will depend on the fire's containment and the amount of smoke it continues to produce.
While flames from the fire are not visible from downtown Petaluma, smoke is blanketing the area and affecting communities throughout Sonoma County.
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"If you've ever smelled like a campfire before, it smells like you're in pretty close proximity to a campfire," said Kristen Bivens, a North Bay resident.
Bivens said her home is near the Woodside Fire, so she came to Petaluma to spend the night. Although she said she knows there has been progress in battling the fire, she plans to remain away from home for another night.
"The smokiness is a little worrisome because my dog here was just barking, barking, barking, and didn't really know what to do with that. So, and I had a headache for hours last night," Bivens said.
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The smoke was not limited to Petaluma. Video from Highway 101 in Santa Rosa also showed heavy smoke conditions tied to the fire.
The Bay Area Air District is urging residents to take protective measures due to the unhealthy and dangerous air quality.
"The best way to protect your health is to really stay indoors with windows and doors closed if temperatures allow, there's also clean air centers and cooling centers throughout the Bay Area that can be accessed if you if you can't protect yourself at home," said Tina Landis of the Bay Area Air District.
The district recommends a tight-fitting N95 mask for those who must go outside.
"It doesn't give full protection, so folks should be aware you're still getting some of that particulate matter in your lungs. So the best the best way to protect yourself is to stay indoors," Landis said.
Landis said wildfire smoke can affect everyone, even though children, older adults and people with preexisting health conditions face elevated risks.
"It does impact all of us, and especially we live in an area where there are wildfires pretty often. So that's a cumulative impact over those years of breathing that smoke in. So you really do need to protect your health, regardless of your age," she said.