The California Independent System Operator (ISO) issued a Heat Bulletin on Tuesday, August 30, warning that upcoming excessive heat may result in blackouts due to the stress on the energy grid.

The Heat Bulletin states: “Starting tomorrow through Tuesday, California and the West are expecting extreme heat that is likely to strain the grid with increased energy demands, especially over the holiday weekend.”

The California ISO then stated in the bulletin that it will likely be required to ask California residents to conserve energy to avoid power outages: “The power grid operator expects to call on Californians for voluntary energy conservation via Flex alerts over the long weekend. During a Flex Alert, consumers are urged to reduce energy use from 4-9 p.m. when the system is most stressed because demand for electricity remains high and there is less solar energy available.”

The complete ISO Heat Bulletin can be accessed here.