From the Document: "On May 19, 2020, following several days of heavy rain, the Edenville Dam on the Tittabawasee River in Gladwin County, Michigan, failed and sent a large volume of water downstream that overtopped the Sanford Dam in Midland County. A local utility company owns both dams. Michigan evacuated approximately 10,000 downstream residents. Concerns were raised about the potential spread of environmental contamination from a Dow Chemical Company facility in Midland and an associated federal Superfund site, which are downstream of the dams. On May 21, 2020, President Trump approved Michigan's emergency declaration and ordered Stafford Act federal assistance for responding to severe storms and flooding beginning on May 16."
CRS Insight, IN11406
Congressional Research Service: https://crsreports.congress.gov/