Why the U.S. grid's extreme heat problem is changing

Solar energy and batteries are making it easier for utilities to meet surging electricity demand during extreme heat, but prolonged high temperatures are exposing other vulnerabilities in the grid. Why it matters: Electricity demand rises as air conditioners work harder in extreme heat, while high temperatures can make parts of the system less efficient and put additional stress on equipment. The big picture: Climate change is extending periods of extreme heat just as electrification and data…