The storms caused extensive damage to infrastructure, including downed power lines, flooded roadways, and fallen trees. In northwest Indiana, Portage reported 'catastrophic' damage, prompting the mayor to sign a Local Emergency Proclamation. Over 300,000 NIPSCO customers in Indiana and 250,000 ComEd customers in Illinois were left without power. High-rise buildings in downtown Chicago urged occupants to seek shelter, and popular locations like Navy Pier implemented emergency protocols. The tornadoes and derecho posed significant risks to public safety and property, with wind speeds reaching up to 100 mph.