Graph displays current system demand plotted against forecast demand and available resources. See tutorial for more information on this graph.
Back to top
Graph shows aggregated output from renewables connected to the ISO grid.
The net demand curve depicts the variability in demand and supply that the ISO must counter balance to maintain grid reliability. Net demand is calculated by taking the actual demand and subtracting the electricity produced by variable generation resources, wind and solar, that are directly connected to the ISO grid.
Higher levels of variable electricity generation increases the ISO operational need for resources with the technological flexibility to start and stop quickly, and maintain output for set periods of time, so we can match supply and demand at all times.
Status of emergency notices issued when operating reserves or transmission capacity limitations threaten our ability to safely and reliably operate the grid.
Active and Archive NoticesCurrent and past emergency notifications
Emergency Fact SheetElectrical emergency declaration and notification process overview
Grid History - 1998 to PresentHistory of no touch, alerts, warnings emergency and conservation declarations
California ISO Annual Peak Load History - 1998 through 2013
Sign up to receive alert, warning and emergency notices.
Funded by the investor-owned utilities and authorized by the CA Public Utilities Commission, Flex Alerts are part of an educational and emergency alert program that informs consumers about how and when to conserve electricity. Go to the Flex Alert tips page for more information.
As the Alerts, Warnings & Emergency status increases the need for conservation will rise.
Read Flex Alert notices and news releases
Learn how to use electricity wisely and help the power grid.
Find out the facts about the ISO role in triggering Flex Alerts.
Sign up to receive Flex Alert notices.
The Power of Community
The Power of the Hands