People in Wirral whose homes were flooded after heavy rainfall on Wednesday will be allowed back into their properties to assess the damage.
Dozens of residents spent the night in temporary accommodation after the River Birket in Moreton burst its banks, sending water gushing into houses.
About 100 properties in the Wastdale Drive area of Moreton were affected.
The Environment Agency said about a month's rain fell in 48 hours. The flood risk has now been downgraded.
Roads also flooded in Bebington, Heswall, Neston and Bromborough.
Resident Michaela George said she opened the door and "was nearly swept off [her] feet as the water started gushing in".
She said "within 15 or 20 minutes it was knee-high".
Housing association Magenta Living said 28 "families, couples and individuals" had to leave their homes and they they did not yet know when they would be able to move back.
Chief Executive Brian Simpson said staff were in talks with tenants "to establish what help, if any, they require".
Mark Camborne, Wirral Council's head of corporate and community safety said: "The recovery operation has now started and we are making every effort to ensure residents have all the help and advice they need to deal with the consequences of the flooding.
"We have staff out cleaning affected roads of debris and sludge, and also helping residents with practical advice."
The Environment Agency has now downgraded a formal flood warning advising residents to "be prepared".