Those living in the Sacramento area may be noticing a thick blanket of haze and smoke Thursday.

The blanket of smoke has prompted a number of agencies to release statements, notifying the public where the smoke is coming from.

“Smoke in Sacramento area is from multiple wildfire incidents in Northern California,” Sacramento Fire Department wrote on its Facebook page. “Sensitive groups please stay indoors where possible."

From the north, south and east, there are several fires surrounding the San Joaquin Valley, and the smoke from those fires is funneling its way into the area.

Smoke from the Pier Fire burning in Tulare County, the Railroad and South Fork Fire burning in both Madera/Mariposa Counties, the Empire Fire burning in Mariposa County, and all other surrounding wildfires have the potential to affect air quality throughout the entire San Joaquin Valley, prompting Air District officials to issue a health cautionary statement Valley-wide.

A strong high pressure system parked over the Valley, blamed for the extreme heatwave the area is also facing, will trap pollution and cause air quality to deteriorate, district officials said. The combination of conditions is expected to continue until early next week.

District officials believe overnight winds may cause smoke to heavily impact the area, with the potential to increase particulates in the ozone.