GridCalifornia Signal briefing3 min read

Why a normal grid can still feel stressed locally

California can have plenty of electricity statewide while a damaged line leaves your neighborhood in the dark. Both things can be true.

High-voltage transmission lines crossing a California desert landscape — Bureau of Land Management · Public domainImage source and license ↗

Statewide supply is not neighborhood service

CAISO keeps electricity supply and demand in balance across most of California’s high-voltage grid. That system can be operating normally while a storm, crash or damaged local line knocks out power to thousands of homes. The reverse can happen too: the state may ask everyone to conserve even while the lights on your street stay on.

Ask the right source

Want to know whether California has enough power? Look at CAISO demand, supply and reserves. Want to know when your house will be back on? Go to your utility’s outage map and alerts.

CAISO: the statewide supply-and-demand picture
Your utility: local cause and estimated restoration
CPUC: consumer information and links to utility maps

The plain-English version

“Grid normal” does not mean “nobody has an outage.” It means the statewide system has enough supply. Local wires can still have local problems.