Flash flood threat issued as destructive storms impact Midwest
Flash flood threat issued as destructive storms impact Midwest
US · Published Aug 11, 2026
Severe weather continues to target the Midwest, Great Lakes, and Ohio Valley regions, with thunderstorms expected to persist throughout the week.
Following Sunday’s storms, which included a tornado in northwestern Illinois, heavy rain and flash flooding are forecast as storms repeatedly track over the same areas.

Impact & Risks

The storms have already caused significant disruptions, including power outages affecting over 1,000 customers in LaSalle County, Illinois. Tornado damage has been reported in Menasha, Wisconsin, and flash flooding poses a Level 2 out of 4 risk across parts of Illinois, Pennsylvania, and West Virginia. Tuesday’s severe weather threat will shift southward, increasing flash flood risks in the central Appalachians and southwestern Ohio. Rainfall totals in some areas may exceed half a foot by Thursday, heightening the risk of localized flooding and property damage.

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