As temperatures on the West Coast soared into the triple digits in early September, power demand threatened to reach record levels — and utilities braced for grid problems.

The California Independent System Operator (CAISO) warned of potential blackouts. Idaho Power Co., already hobbled by a pair of generator outages, prepared to cut power to some customers in Boise. Utilities in the desert Southwest expected surging demand to strain their grids.

But no major blackouts occurred during the multiday heat wave. The Pacific Northwest sent much-needed power to California, which in turn was able to send electricity to Boise. And desert states didn’t see dire conditions, allowing them to send power to California.

Western states ponder regional grid as renewables grow – E&E News (