Full Breakdown
Massive Storm System Ravages Chicago Metro and Midwest on August 11, 2026
8/12/2026, 11:48:43 AM
Core Event: Derecho-Driven Tornadoes, Wind Damage and Power Outages
On Tuesday, August 11, 2026 a fast-moving derecho swept across the Chicago metropolitan area and the broader Midwest. The National Weather Service confirmed three EF-1 tornadoes—one tracking from Monee to Crete, a second from Orland Park to Flossmoor, and a third near Mokena. Straight-line winds reached 80 mph in Cook and Will counties, with gusts reported at 99 mph in Gary, Indiana, and 97 mph at Aurora Municipal Airport. The storm knocked out power for roughly 991,000 customers across Illinois, Indiana, Ohio and Kentucky, forced a ground stop at Chicago’s O’Hare and Midway airports, and caused at least one fatality in northwest Indiana when a house explosion occurred during the event.
Background & Context
Illinois entered 2026 with an unprecedented tornado season. By the end of July the state had logged 220 confirmed tornadoes, shattering the previous yearly record of 191 set in 2024.
Data & Statistics
- Tornadoes: 3 EF-1 tornadoes confirmed in the south suburbs.
- Wind: Gusts up to 99 mph (Gary, IN) and 97 mph (Aurora, IL).
- Power outages: ~991,000 customers without electricity; 69 % of Homewood lost power.
- Aviation impact: ~45 % of O’Hare flights delayed, 10 % canceled; Midway experienced a temporary ground stop.
- Fatalities: One death in northwest Indiana from a house explosion; Ohio Gov. Mike DeWine reported a separate death in Roseville, Ohio, after floodwaters prevented emergency response.
Official Statements & Responses
ComEd’s executive vice president and COO David Perez said the utility had pre-positioned crews and equipment, yet the damage “across the region is extensive.” The Small Business Administration (SBA) activated disaster loan outreach centers in Kane County, offering up to $500,000 in low-interest loans for homeowners and up to $2 million for businesses; applications are accepted for property damage and economic injury.
On-the-Ground Reports
Residents described sudden, violent winds that forced them into basements for up to 45 minutes. At Oak Brook’s Nordstrom, shoppers were escorted to the lower level, while Homewood High School sheltered 250 students and faculty. In Tinley Park, a resident reported a tree crushing a roof and scattering chairs across the yard. Power loss persisted for two days for many, prompting concerns about food spoilage and limited shopping options.
Conflicting Reports & Gaps
The death toll includes a 4-year-old child in southeastern Indiana (reported by Jennings County sheriff’s deputy Cody Low) and a separate fatality in Roseville, Ohio (announced by Gov. DeWine). Sources have not confirmed whether the Indiana explosion was directly caused by the storm, and investigations into the Ohio death remain ongoing.
What’s Next
The SBA’s disaster loan program remains open. Utility crews continue restoration efforts, aiming to restore 80 % of customers by Thursday noon and 99 % by Saturday night. Meteorologists warn that additional rounds of heavy rain could produce further flooding through Thursday, with the most severe risk remaining in the Ohio Valley and central Appalachians. Residents are urged to stay alert for updated warnings and to avoid downed power lines.
