Statewide flex alert issued for Wednesday due to heat, tight supply conditions

The sun sets behind power lines in Los Angeles, California on September 3, 2020, ahead of a heatwave to arrive September 4 through the Labour Day weekend prompting a statewide flex alert. (Photo by Frederic J. BROWN / AFP) (Photo by FREDERIC J. BROWN

Officials with California Independent System Operator have issued a statewide flex alert for Wednesday, July 28. 

California's grid operator says they predict high demand for energy use due to higher than normal temperatures. They also mentioned there would be tight supplies across the West. 

They are asking residents to voluntarily conserve energy from 4 p.m. to 9 p.m. to alleviate strain on the power grid. 

While those conditions for potential stress on the grid persist for Wednesday, the operator said they would not issue a flex alert for Thursday. 

California ISO shared the following tips to conserve energy: 

  • Pre-cool home by setting the thermostat to as low as 72 degrees 
  • Use major appliances:
  • washer and dryer - do laundry
  • oven and stove - pre-cook and prep meals
  • run the dishwasher
  • Adjust blinds and drapes to cover windows

Tips during a Flex Alert from 4 p.m. to 9 p.m.:

  • Set thermostat to 78 degrees or higher, if health permits
  • Avoid using major appliances
  • Turn off all unnecessary lights

For more information on flex alerts, visit