Electrical grid transmission towers in Pasadena, Calif. Major power outages from extreme weather have risen dramatically in the past two decades.

FILE – In this Saturday, Aug. 15, 2020, file photo, electrical grid transmission towers are seen in Pasadena, Calif. Energy regulators are blaming blackouts last summer that affected hundreds of thousands of Californians on poor planning, electrical market problems and a heat wave that blanketed the West. Wednesday, Jan. 13, 2021, report covered rotating blackouts on Aug. 14 and Aug. 15 that affected 800,000 homes and businesses. (AP Photo/John Antczak, File)