– 0 customers out in the US
August 2021 · 67th largest of 72
Thunderstorms
Aug 11, 2021. At the peak, 650,893 customers were without power, most of them in Michigan, Illinois, Wisconsin.
Thunderstorms Customers out at the peak 650,893 Aug 11, 2021, 12:00 AM
Customer-hours lost 11M Every customer out, times every hour out
Counties with 10%+ out 46 of 161 counties affected
Above 600,000 out nationally 2.0 hours Aug 11, 2021, 12:00 AM onward
States affected 30 MI · IL · WI · VA · CA
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
Where it hit
| State | Peak out | Share | Counties 10%+ |
|---|---|---|---|
| Michigan | 215,734 | 13% | 21 |
| Illinois | 202,857 | 5% | 5 |
| Wisconsin | 177,126 | 9% | 6 |
| Virginia | 93,751 | 8% | 4 |
| California | 26,641 | 3% | 0 |
| Florida | 22,786 | 4% | 1 |
| Ohio | 22,518 | 6% | 1 |
| Maryland | 15,645 | 2% | 0 |
| Pennsylvania | 14,139 | 3% | 1 |
| Indiana | 11,039 | 4% | 0 |
| North Carolina | 7,049 | 3% | 0 |
| Missouri | 7,027 | 2% | 0 |
| South Carolina | 6,516 | 3% | 0 |
| Kentucky | 5,892 | 6% | 1 |
| Iowa | 5,768 | 3% | 0 |
| West Virginia | 5,587 | 8% | 1 |
| Tennessee | 4,525 | 2% | 0 |
| New York | 3,823 | 2% | 0 |
| District of Columbia | 3,770 | 1% | 0 |
| Georgia | 3,678 | 9% | 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
The hardest hit
- Falls Church, VA 86%
- Lake, MI 70%
- Leelanau, MI 62%
- Mason, MI 59%
- Kalkaska, MI 57%
- Newaygo, MI 47%
- Mecosta, MI 44%
- Van Buren, MI 42%
- Carroll, IL 37%
- Benzie, MI 33%
- Waukesha, WI 32%
- Oceana, MI 29%
- La Paz, AZ 29%
- McHenry, IL 26%
- Montcalm, MI 23%
- Wexford, MI 22%