High pressure over California resulted in very hot daytime temperatures and warm overnight low temperatures across interior Northern California. High to very high heat risk impacted the region. One daily high temperature record was broken. During the event, cooling centers were made available to the public across interior Northern California.

Excessive Heat in MT SHASTA/WESTERN PLUMAS COUNTY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Portions of the region saw high temperatures reach upwards of 100 to 104 degrees during the event.

Excessive Heat in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Downieville reported a high temperature of 102 on the 7th. Generally the region saw high temperatures reach the mid to upper 90s.

Excessive Heat in BURNEY BASIN/EASTERN SHASTA COUNTY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Burney Basin region saw high temperatures reach over 100 degrees during the event.

Excessive Heat in SHASTA LAKE/NORTH SHASTA COUNTY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Lake Shasta Dam saw high temperatures reach 104 degrees during the event.

Excessive Heat in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Northern Sacramento Valley saw high temperatures reach in excess of 105 degrees, with Redding airport reaching 108 degrees during the event.

Excessive Heat in MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO WESTERN COLUSA COUNTY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The western foothills of the Sacramento Valley saw high temperatures reach upwards of 107 to 112 degrees during the event.

Excessive Heat in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The north eastern foothills of the Sacramento Valley saw high temperatures reach upwards of 104 to 109 degrees during the event.

Excessive Heat in MOTHERLODE/CAMPTONVILLE TO GROVELAND, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Motherlode region saw high temperatures reach upwards of 106 to 109 degrees during the event.

Excessive Heat in CENTRAL SACRAMENTO VALLEY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Central Sacramento Valley region saw high temperatures reach upwards of 105 degrees during the event. On September 7th, Marysville recorded a high temperature of 106 degrees.

Excessive Heat in SOUTHERN SACRAMENTO VALLEY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Sacramento region saw high temperatures reach in excess of 105 degrees. On the 8th, downtown Sacramento reached 106 degrees.

Excessive Heat in CARQUINEZ STRAIT AND DELTA, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Delta regions saw high temperatures reach upwards of 105 degrees. Nut tree airport in Vacaville reported a high temperature of 108 degrees on the 8th.

Excessive Heat in NORTHERN SAN JOAQUIN VALLEY, CALIFORNIA
From 07-SEP-21 12:00:00 to 09-SEP-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Northern San Joaquin Valley saw high temperatures reach over 100 degrees during the event.