The SCU (Santa Clara Unit) Lightning Complex fires were wildfires that burned in the Diablo Range in California in August and September 2020 as part of the 2020 California wildfire season.

[1] The name is derived from the three-letter designation given to the California Department of Forestry and Fire Protection (Cal Fire) division responsible for the Santa Clara, Alameda, Contra Costa, and parts of San Joaquin and Stanislaus counties, and the complex consisted of several distinct fires occurring in this region.

The fire complex had destroyed 222 structures, damaged another 26, and injured 6 people.

[1] A year following the fire the East Bay Regional Park District (EBRPD) and Save Mount Diablo (SMD) monitored the fire impact on the 6,000 acres of the park district lands.

The study prompted CalFire officials to consider increasing the use of prescribed burning in Alameda and Contra Costa counties.