Two derechos in one historic summer
Official records show separate derechos on June 10 and August 11, 2026. The second swept into Northwest Indiana and caused the Gary power crisis—then more storms and exceptional flooding compounded the damage.
Corrected and expanded August 24, 2026 · La Porte Weather Now analysis
The timeline official records establish
June 10: NWS Chicago says a derecho produced widespread wind damage across Northern Illinois, along with a brief EF-0 tornado near Alsip. This was a separate event roughly two months before the Gary disaster.
August 11: A powerful morning derecho crossed Northern Illinois and Northwest Indiana. Official summaries document widespread destructive winds and tornadoes. Gary recorded a 99 mph gust, and the damage contributed to prolonged power outages across the region.
After August 11: Northern Indiana endured additional thunderstorms, extraordinary rainfall, and flooding. Those rounds compounded the emergency, but official sources do not identify them as a third derecho.
Why this belongs in local weather history
Two derechos affecting the same broad regional corridor in roughly two months is a remarkable concentration of high-impact weather. The August event then overlapped with a prolonged infrastructure crisis and was followed by exceptional rainfall and flooding. Taken together, this was not an ordinary run of summer thunderstorms; it was an extraordinary regional sequence that communities will measure by its damage, outages, disruption, and recovery.
Final national records for 2026 are not yet complete, so it would be premature to call the sequence the first, the rarest, or a formal record. “Historically significant” is the responsible description: the documented combination of repeated widespread wind disasters and compounding flood impacts makes the summer exceptional without claiming a ranking officials have not established.
Why the earlier version needed correction
Our original analysis focused too narrowly on whether storms after August 11 constituted a second derecho. That framing overlooked the documented June 10 Illinois derecho. The accurate answer is that Illinois experienced two separate derechos in 2026, while Northwest Indiana was directly affected by the August 11 event. We corrected the story because public trust requires a clear record.
How unusual is two?
A 2026 NOAA-affiliated research archive identified 144 derechos across the contiguous United States from 1955 through 2025—about three per year nationally. Two somewhere in the country during one year is therefore plausible. Two affecting the same regional corridor within about two months is much more notable, but the available archive does not support assigning a simple local probability.
The label is not the warning
The National Weather Service does not issue a “derecho warning.” Derecho is generally determined from the storm’s completed organization and damage path. Residents should act immediately on Severe Thunderstorm Warnings, Tornado Warnings, Flash Flood Warnings, and local emergency instructions. Destructive straight-line winds can be life-threatening whether or not the system is later classified as a derecho.
The question residents deserve to ask
Nearly two weeks after the August 11 derecho, NIPSCO reported on August 23 that thousands of customers were still without electricity systemwide and that more than 5,000 remaining outages were tied to the derecho and subsequent storms. At the same time, Indiana was operating under a statewide disaster emergency, state agencies were coordinating assistance, and federal emergency support had been authorized.
That contrast is understandably infuriating—but “relief funding” is not one unrestricted pot of money that can instantly reconnect a home. Emergency declarations unlock coordination, protective measures, damage assessment, debris removal, and possible aid programs. Utility restoration requires damaged poles, lines, substations, and local circuits to be rebuilt safely. Indiana’s State Disaster Relief Fund mainly helps eligible uninsured or underinsured residents repair a primary residence; it does not replace utility crews or guarantee every applicant an award.
Those distinctions do not remove the need for accountability. They sharpen the questions: Which neighborhoods remain out, and why? What is the restoration deadline for each area? What state or federal resources have reached Lake County? How are elderly, medically vulnerable, and low-income residents being contacted? What will be changed before the next historic storm?