ISO Overview VideoFlex Alerts are voluntary calls for consumers to conserve electricity.
When the California ISO calls a Flex Alert take three simple actions:
Thermostat Set your air conditioner to 78° or higher, if health permits clockicon63x63 Use major appliances before 3:00 p.m. Turn Off Lights Turn off all
unnecessary lights
Plug More energy saving tips

Today's Energy Outlook

A Flex Alert is typically issued in the summer when extremely hot weather pushes up energy demand as it reaches available capacity. This usually happens in the evening hours when solar generation is going offline and consumers are returning home and switching on air conditioners, lights, and appliances.

View Today's Outlook for current grid conditions

Summer Resources

View the Governor's Office of Emergency Services Map of Cooling Centers for a local list of suggested cooling centers, or cool locations for the public.

Winter Resources

Tips and news to conserve gas and electricity during the winter months, visit and

About the California Independent System Operator (ISO)

The ISO manages the flow of electricity across the high-voltage, long-distance transmission lines delivering power to the state’s three investor-owned utilities.

The utilities, Pacific, Gas & Electric, San Diego Gas & Electric, and Southern California Edison, are responsible for delivering electricity from the high-voltage transmission lines to its customers.

The ISO is a nonprofit public benefit corporation that also operates a competitive wholesale energy market, and conducts transmission planning to identify grid expansion needs.