California's statewide Flex Alert in effect through Wednesday

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VIDEO: What's a Flex Alert?
So a Flex Alert has been issued in California amid a heat wave, but what exactly does that mean?

SAN FRANCISCO (KGO) -- The California Independent System Operator, which oversees the state's electrical grid, issued a statewide Flex Alert - a call for voluntary electricity conservation - from 4 p.m. to 9 p.m., Wednesday, Sept. 7 due to predicted high temperatures pushing up energy demand and tightening available power supplies.

LIVE: Track real-time temps across Bay Area

"The conservation measures can help the power grid during a time of tight demand and supply, and avoid power interruptions. Energy reduction during a Flex Alert can prevent further emergency measures, including rotating power outages," California ISO says.

  • Setting the thermostat to 78 degrees
  • Turning off unnecessary lights
  • Using large appliances like washers and dryers during off-peak hours
  • Close blinds and drapes to keep rooms cool
  • "Pre-cool" homes overnight so they don't need as much energy to cool during the day
  • Use fans instead of AC when possible

More tips available here.