Dive Summary:

• The Midwest Independent Transmission System Operator (MISO) announced on Wednesday that 11 U.S. Midwest states and the province of Manitoba in Canada reached a new high for peak electricity usage Monday.
• The region hit 98,576 megawatts (MW) Monday afternoon, breaking a June 2011 record of 98,526 MW.
• Air conditioner use as a result of the week's heatwave was credited for the spike.

From the article:

Demand for electricity in the U.S. Midwest reached record breaking levels on Monday as homes and businesses across the region cranked up their air conditioners to escape a heatwave, the operator of the Midwest power grid said on Wednesday. ...