A haze visible in parts of the Sacramento Valley on Thursday is from multiple fires in Northern California. The Woodland Fire Department said it received several calls on Thursday about smoke in the air and reassured in a Facebook post that the haze is not from any local fires, but rather it's from fires burning up north.

Air quality is unhealthier-than-average for some people Thursday as winds are blowing wildfire smoke across the Northern California region.

The Bay Area Air District issued an air quality advisory on Thursday due to smoke from fires in the Sacramento Valley, which is expected to drift into the region, reaching all the way to the Santa Clara Valley.