The California Independent System Operator Corporation is asking residents across the state of California to conserve electricity.

A statewide flex alert was issued Tuesday for a voluntary electricity conservation from 2 p.m. to 9 pm. Consumers are being asked to conserve through decreasing their electricity usage when using air conditioners, lights, using major appliances and setting their air conditioners to 78 degrees or higher.

This is to make sure there are no power interruptions and that the power grid can become strained when there is high air conditioning use in hot weather.

The expected power usage is to exceed 48,000 megawatts on Tuesday, which is the highest demand on the grid seen so far by officials.

A flex alert is issued when the electricity grid is under stress due to generation or transmission outages, or from persistent hot temperatures.

For more information or to sign up for alerts, visit