Air Quality Index (AQI) data and severity categories come from the EPA's AirNow site. The categories are:
"Moderate" AQI is 51 to 100. Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people. For example, people who are unusually sensitive to ozone may experience respiratory symptoms.
"Unhealthy for Sensitive Groups" AQI is 101 to 150. Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
"Unhealthy" AQI is 151 to 200. Everyone may begin to experience some adverse health effects, and members of the sensitive groups may experience more serious effects.
"Very Unhealthy" AQI is 201 to 300. This would trigger a health alert signifying that everyone may experience more serious health effects.
"Hazardous" AQI greater than 300. This would trigger a health warnings of emergency conditions. The entire population is more likely to be affected.
Wind Data comes from the National Centers for Environmental Prediction. This information is updated every 6 hours.
Started: August 22, 2019
Containment: 40%
Description: A wildfire is burning off Bear Mountain Road and Dry Creek Road, north of Bella Vista in Shasta County. Evacuations and road closures are in place.
Started: June 8, 2019
Containment: 100%
Damage: 7 structures destroyed
Description: Seven structures were destroyed and two people suffered minor injuries after a rapidly spreading fire burned over 2,500 acres near the town of Guinda.
Started: June 12, 2019
Containment: 100%
Description: A vegetation fire in San Luis Obispo County has been contained after spreading to 1,764 acres.
Started: June 25, 2019
Containment: 100%
Description: Forward spread of fire has been stopped.
Started: June 25, 2019
Containment: 100%
Description: The fire has been contained, but Del Puerto Canyon Rd remains closed.
Started: July 3, 2019
Containment: 100%
Description: The Hollow Fire started July 3, 2019 off West Corral Hollow Road, Carnegie State Vehicular Recreational Area, southwest of Tracy in San Joaquin County.
Started: July 8, 2019
Containment: 100%
Description: The Gillis Fire started July 8, 2019 off Gillis Canyon and South East of Shandon in San Luis Obispo County.
Started: July 28, 2019
Containment: 100%
Description: Crews are continuing to make good progress securing containment lines around the Tucker Fire. No structures have been damaged or destroyed.
Started: August 3, 2019
Containment: 100%
Description: Firefighters took control of eight separate vegetation fires that had burned 757 acres near Clayton.
Started: August 8, 2019
Containment: 100%
Description: The W1 Fire started on August 8 2019 near Cold Springs Rd and McDonald Peak, 11 miles southeast of Madeline Lassen County. It has been contained after burning high desert grasses, brush and juniper.
Started: August 16, 2019
Containment: 100%
Description: A Cal Fire strike team was sent to help Mexican fire crews with a 1,500-acre blaze at the border.
Started: August 16, 2019
Containment: 100%
Description: The Gaines Fire sparked near Mt. Gaines Road and Bear Valley Road in Bear Valley.
Reporter
Kimberly Veklerov • kveklerov@sfchronicle.com • @KVeklerov
Newsroom Developers
Evan Wagstaff • evan.wagstaff@sfchronicle.com • @EvanWagstaff
Lucio Villa • lvilla@sfchronicle.com • @luciovilla
Contributing Developer
Jeremy Rue • jrue@berkeley.edu • @jrue
Data Developer
Clint Wirtanen • cwirtanen@sfchronicle.com • @ClintWirtanen
Executive Producer
Brittany Schell • bschell@sfchronicle.com • @brittlynns
Managing Editor, Enterprise
Michael Gray • mgray@sfchronicle.com • @GrayMikeG
Managing Editor, Digital
Tim O'Rourke • torourke@sfchronicle.com • @TimothyORourke
Editor In Chief
Audrey Cooper • acooper@sfchronicle.com • @audreycoopersf