Milwaukee Flash Flooding August 2025

Active Response

Status:

August 9, 2025

Disaster Reported:

Wisconsin (WI)

Affected area(s):

Event Summary

The flash flood in Milwaukee Wisconsin occurred during August 9–10, triggered by a remarkable rain event—Milwaukee recorded its second‑wettest two‑day total ever. Some areas reported over 14 inches of rainfall in less than 24 hours.

Milwaukee proper was heavily affected, especially north side neighborhoods.
The suburb of Wauwatosa was particularly hard hit, with widespread structural and business damage
Counties reporting damage include Milwaukee, Waukesha, Washington, Ozaukee, and Dodge
Other localities, such as Greenfield and West Allis, also reported significant flooding, sewage backups, and damage

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News & Resources

Homes & Structures Damaged

7,226 damage reports were submitted to IMPACT 211, encompassing structural, utility, and water damage .
Of these, about 6,287 reports originated from Milwaukee County alone.

The most impacted ZIP codes (within Milwaukee) were:

53218: 1,240 reports
53209: 1,014 reports
53216: 541 reports
Additional reports spread across 53219, 53223, 53225, and others

Residential Damage & Displacement

Over 1,600 households reported significant damage, especially in the north side and Glendale neighborhoods.
Many homes near Lincoln Creek were fully flooded—basements inundated, foundations damaged, and in some cases, entire homes destroyed.
At least 11 homes across areas including West Allis had collapsed foundations.

Wauwatosa—Community-Scale Impact

More than 500 homes and 50 businesses in Wauwatosa were affected.
Damage to city-owned public property in Wauwatosa is estimated at roughly $9 million, particularly at Hart Park.
Structures like the lower-level facilities of the Wauwatosa Curling Club were completely flooded, while upper levels sustained minor damage.

Public Infrastructure Losses

Milwaukee County estimates roughly $23 million in damage to public infrastructure, including roads—one in Brown Deer was washed out into a cliff‑like crater

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