Searchers in the American state of Colorado are pushing into ever more remote areas, in hope of rescuing people left stranded by the floods that began one week ago.
The death toll has been revised downwards to six, with close to 200 people still unaccounted for.
Many of these are believed to be merely cut off in remote areas inundated by the historic rains.
The Colorado Office of Emergency Management says two people presumed dead have now been listed as missing instead "to more accurately reflect their status".
More than 3000 people and hundreds of pets have been evacuated by air and ground and several towns are still circled by raging waters, the BBC reports.
The floods have destroyed 1500 homes destroyed and damaged another 17,000 properties after a flash flood rainstorm followed days of rain in the early hours of Wednesday last week.
The downpour dumped about 53 centimetres of rain in parts of Boulder City, nearly double the area's average annual rainfall.