SAN JOAQUIN VALLEY, Calif. — The Walker fire in Calaveras County has marked the beginning of wildfire season in the San Joaquin Valley.

Beginning on June 16, the Walker has burned through roughly 1,100 acres so far, but as of Thursday, the fire has been 50% contained.

While the Walker fire is being contained, air pollution officials continue to monitor the situation in the valley.

Officials are asking residents to be prepared for the smoke impacts of the fire season.

A build-up of dry vegetation during the hot summer months presents a high risk for hotter, faster-moving fires in mountain communities surrounding the Valley.

Residents must also note that basic cloth or paper face masks, do not provide the appropriate protection from the matter found in fire smoke.

For those choosing to protective wear face masks as smoke protection, professional guidance is provided.

Check here for more information or call a District office in Fresno (559) 230-6000, Modesto (209) 557-6400 or Bakersfield (661) 392-5500.