Full Breakdown
Midwest Derecho and Severe Storms Leave Hundreds of Thousands Without Power, Cause Fatalities
8/13/2026, 12:32:32 AM
Core Event
On August 11, 2026 a massive derecho swept from Iowa through northwest Indiana into Ohio, producing wind gusts of 99 mph (159 kph) in Gary, Indiana, and spawning at least three confirmed tornadoes in the Chicago suburbs. Straight-line winds and tornadoes ripped roofs off homes, toppled trees, and generated flash-flooding that overwhelmed roads from northern Illinois to western Pennsylvania. The system continued into August 12, leaving power outages, injuries, and three confirmed deaths.
Background & Context
A derecho is a long-lived line of severe thunderstorms that can produce wind damage comparable to tornadoes or hurricanes. Meteorologists noted that the August 11 event met the Storm Prediction Center’s criteria: a wind-damage swath over 250 miles long with gusts exceeding 58 mph. The Midwest has already endured an unusually active tornado season, with Illinois recording a record-breaking 220 tornadoes by the end of July 2026, far above the 54-tornado average for 1990-2020.
Timeline
- August 11, 2026 – Derecho develops, wind gusts reach 99 mph, tornadoes touch down in southern Cook County and eastern Will County, and heavy rain sets a daily record of 2.07 inches in Dayton, Ohio. A 4-year-old boy is killed when a tree falls on his home in Geneva Township, Indiana; a house explosion in Portage, Indiana, kills one person; a resident of Roseville, Ohio, dies after flood-blocked responders cannot reach them.
- August 12, 2026 – Power outages persist, emergency declarations are issued, and the National Weather Service investigates a communications outage that delayed warnings.
Data & Statistics
- Power outages: Estimates range from more than 650,000 customers to nearly 1 million across Illinois, Indiana, Ohio, Kentucky and West Virginia.
- Deaths: Three confirmed fatalities – the Indiana child, the Roseville resident, and the person killed in the Portage explosion.
- Tornadoes: At least three EF-1 tornadoes confirmed in the Chicago area; the NWS later identified two additional weak tornadoes near Chicago.
- Rainfall: Dayton recorded 2.07 inches, breaking a 1915 record; some locations received 6–8 inches in a single day.
Official Statements & Responses
Governor Mike DeWine warned that “this is not something that will end tonight” and declared states of emergency in Perry and Muskingum counties. The NWS acknowledged a software-upgrade failure that delayed warning dissemination for about 1 hour and 14 minutes on August 12 and pledged an investigation.
On-the-Ground Reports
First-responders used boats to rescue residents trapped in knee-deep floodwaters, such as the family of Kaitlyn Rodgers in Crooksville, Ohio. Residents described the storm as unprecedented in intensity, noting green-tinged skies, deafening wind, and trees crushing cars and homes.
Conflicting Reports & Gaps
Outage figures differ by up to 350,000 customers across sources, reflecting varying tracking methods and real-time updates. Tornado counts range from two to five, with some surveys still pending. The cause of the Portage house explosion remains under investigation; officials suspect storm-dropped trees may have damaged gas lines, but no definitive conclusion is available.
What’s Next
The Storm Prediction Center has issued a Level 3 flood-risk corridor covering eastern Indiana, southern Ohio, western West Virginia and northern Kentucky through August 12-13, with rainfall forecasts of 3–5 inches in the hardest-hit zones. The NWS is reviewing the August 12 communications outage and plans to upgrade its warning infrastructure. Utility companies aim to restore power to the majority of customers by the weekend, while federal disaster assistance is being mobilized for affected homeowners and businesses.
