A fourth body has been recovered after floods in the western US state of Colorado, as the area received nearly half its normal annual rainfall in a single day, reports say.
Officials in Boulder County, in the northeast of the state, recovered the body of a woman swept away after leaving her vehicle on Thursday, Sheriff Joe Pelle said, according to CNN.
The body of a man who left the same car had already been recovered.
An estimated 38 centimetres of rain fell on the area on Thursday.
About 80 people in Boulder have been reported missing, CNN reported, quoting a local sheriff department spokeswoman.
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President Barack Obama declared a state of emergency for Boulder and the nearby counties of El Paso and Larimer, the Federal Emergency Management Agency (FEMA) said.
The declaration orders federal aid to supplement state and local response efforts.
The National Weather Service issued a flood warning and said flooding and heavy rain would continue late on Friday.
Several areas were under evacuation orders, the Denver Post reported.
The Rocky Mountain National Park was closed to visitors, according to the park's website, and the University of Colorado cancelled Saturday's scheduled football game.
