Thunderstorms

Aug 11, 2021. At the peak, 1,135,233 customers were without power, most of them in Michigan, Ohio, Missouri.

Thunderstorms

Customers out at the peak 1,135,233 Aug 12, 2021, 8:00 PM

Customer-hours lost 64M Every customer out, times every hour out

Counties with 10%+ out 158 of 524 counties affected

Above 600,000 out nationally 2.5 days Aug 11, 2021, 3:00 PM onward

States affected 45 MI · OH · MO · PA · VA

Hardest-hit county 74%out Arenac, MI · 7,295 customers

Hour by hour

The country, in the dark

Customers without power across the US, two days either side. The shaded band is the time the national total stayed above 600,000.

By state

State	Peak out	Share	Counties 10%+
Michigan	991,393	21%	43
Ohio	216,363	6%	10
Missouri	148,370	15%	12
Pennsylvania	145,359	4%	4
Virginia	100,770	6%	12
Illinois	93,275	6%	6
New York	74,092	3%	2
California	61,647	2%	2
Indiana	57,952	8%	7
Maryland	54,084	3%	1
North Carolina	49,353	3%	2
Florida	44,743	2%	2
Arkansas	41,591	6%	5
Texas	37,859	3%	5
Georgia	32,351	2%	5
New Jersey	32,239	7%	2
Tennessee	30,797	3%	4
Massachusetts	29,467	4%	1
Wisconsin	25,730	6%	2
Louisiana	25,223	3%	2

State peaks add each county's own peak, which may fall at different hours, so they can exceed the true simultaneous total.

By county