An aerial image shows solar panels part of an electricity generation plant on June 18, 2021 in Kern County near Mojave, California. - The California ISO extended a Flex Alert asking customers to conserve electricity amid concerns of power outages during the heat wave. Much of the western United States is braced for record heat waves this week, with approximately 50 million Americans placed on alert Tuesday for "excessive" temperatures, which could approach 120 degrees Fahrenheit (50 degrees Celsius) in some areas. (Photo by Patrick T. FALLON / AFP)