The agency that manages California's energy grid says electricity supplies will be tight this summer.
"Worried? No. Concerned? Yes," CAL-ISO's Steven Greenlee said.
Greenlee says electricity supplies will be tight in high-load periods when it gets really hot, especially during evening hours when solar power dissipates.
He says last year we had the benefit of abundant hydroelectric resources.
"This year though, because of the way that the weather happened, we are going to have less hydroelectricity to serve demand," he said.
This past winter's relatively low snowpack means hydroelectric production will be down 42 percent compared to last year. Still, CAL-ISO says there is an extremely low probability the agency will be forced to initiate rotating power outages.