Sunday's destructive flooding left the former mill town heartbroken as it had bounced back from another destructive storm less than two years ago.
In some places, the floodwater reached the first floor of buildings.
They face another mammoth cleanup and another daunting comeback.
It was a repeat of another major flood in 2016, when two people were killed and the city suffered millions of dollars in damage.
Sunday's dramatic flooding tore up streets and swept away dozens of parked cars in the city, which sits in a ravine on the west bank of the Patapsco, about 13 miles (20 kilometers) west of Baltimore. - Authorities in Maryland's Howard County have issued what they're calling a "precautionary health alert" after a sewage main broke following torrential rains that prompted destructive flash flooding.
Some buildings had just finished final renovations from the 2016 flood when they were again gutted by floodwaters. On Monday, rescue workers were still looking for any sign of Hermond.
An army veteran who tried to save people in the horrific Maryland flood on May 27 has gone missing, and local police have put out desperate pleas for help in finding him. Significant flash flooding and multiple water rescues have been reported on Main Street in Ellicott City. The missing person was identified by WBAL-TV as Eddison Hermond, a member of the National Guard who was working to rescue people from the flood when he was swept away.
Local officials say the damage might be even worst this time around. "All I'm thinking about is the folks whose lives have been devastated for a second time in two years".
"This is where we're one Howard again, and we'll be one Ellicott City", he said.
For the second time in almost two years, a catastrophic flash flood hit Ellicott City and Main Street. Some spots may have received 10 inches of rain in a three-hour span.
"In a normal heavy rain. you wouldn't see this amount of flooding, where you see cars floating down the road", the meteorologist said.