A Flex Alert has been issued by the California Independent System Operator Corporation (ISO) for Tuesday and Wednesday due to high temperatures across the region. 

The alert calls for California residents and most of the western U.S to conserve electricity from 5 p.m. to 9 p.m. during these days. Flex Alerts are issued when the electricity grid is overtaxed due to high temperatures, the ISO said.

In some parts of the Bay Area, temperatures on Tuesday and Wednesday are expected