ELLICOTT CITY, MD – MAY 31: Police tape blocks off the entrance to Ellicott City as Main Street remains closed under police guard following devastating flooding on May 31, 2018 in Ellicott City, Maryland. A flash flood warning remains in effect as more rain is expected. On May 27 Ellicott City experienced massive flooding for the second time in two years. (Photo by Alex Edelman/Getty Images)