Over on the eastern side of the Pacific Ocean there has been a summer heat wave in California:

As a consequence air conditioning works hard, electricity demand goes up, and over the last few days there have been some rolling blackouts across the Golden State. According to the New York Times on August 16th:

As temperatures began to rise in California on Friday and again on Saturday, the manager of much of the state’s electric grid called on utilities to cut power to hundreds of thousands of customers.
But the rolling blackouts on those days left some of the state’s energy experts bewildered. They said that the utilities had plenty of power available and that the blackouts weren’t necessary. The grid’s capacity may be tested in coming days as temperatures are forecast to reach into the triple digits again in some places.

The grid’s capacity was indeed tested in the following days. It’s not clear why the California Independent System Operator (CAISO for short) didn’t issue a call for a voluntary “Flex Alert” on August 15th, but the ultimate consequence was some power cuts. Here’s CAISO’s record of electricity demand and renewable generation that day: