Washington, D.C., Mayor Muriel Bowser requested federal emergency assistance from President Donald Trump‘s administration in response to the massive sewer collapse in the Potomac River.

Bowser made her first public move on the issue this week, declaring the now-largest sewage spill in U.S. history a “local public emergency” on Wednesday evening. Bowser then sent a letter to Trump and D.C.’s regional Federal Emergency Management Agency administrator requesting federal help and declaring the situation a federal “major disaster.”