On June 26, 2021, nearly 6 inches of rain fell across Detroit in a single day — the most in 80 years. The storm overwhelmed the city’s pump stations and combined sewer system, and thousands of homeowners reported water in their basements. Michigan’s Governor at the time called it far beyond what the region’s storm sewer system was ever designed to handle.
The Detroit flood of 2021 is a useful case study because most of the damage didn’t come from the Detroit River overflowing its banks — it came from sewer backup and street flooding during an extreme rain event. That distinction matters: a standard homeowners policy typically doesn’t cover that kind of water damage, regardless of whether your address sits in an official high-risk flood zone.
It’s also not an isolated data point. According to First Street Foundation’s flood model, Detroit has more properties at substantial flood risk than any other city in Michigan — nearly 40,000 — and that number is projected to keep climbing over the next 30 years. The 2021 storm is a real-world preview of what that risk looks like on the ground.
If you’re a Detroit homeowner, the 2021 flood is worth treating as a reason to check your specific coverage, not just a historical footnote. Compare Detroit flood insurance quotes across NFIP and private carriers to see what coverage would cost for your home, or get an instant quote in about two minutes.