(Updates with second death and evacuation details)
By Keith Coffman
BOULDER, Colo., Sept 12 (Reuters) - Flooding in Colorado left two people dead, prompted hundreds to be evacuated, caused building collapses and stranded cars, officials said on Thursday.
One person died when a home collapsed outside Boulder and another body was found in Colorado Springs, about 100 miles (160 km) to the south, officials said.
A Boulder County Office of Emergency Management spokesman said conditions were "extremely dangerous" and up to 4 inches (10 cm) of additional rain was expected on Thursday.
"There is water everywhere," said the spokesman, Andrew Barth. "We've had several structural collapses, there's mud and muck and debris everywhere. Cars are stranded all over the place."
The National Weather Service has issued a flash flood warning for central Boulder County. Overnight, a separate flash flood warning was issued for southeastern Colorado.
Emergency crews searching door-to-door in Jamestown outside Boulder, found one body while evacuating residents who were stranded in canyons above the city, Barth said. The body of a man was recovered in Colorado Springs by police on flood watch foot patrols, the city's fire department said in a statement.
The University of Colorado's Boulder campus evacuated more than 400 students from ground-floor campus housing overnight, said Ryan Huff, a spokesman for the campus police. (Additional reporting by Chris Francescani; Editing by Maureen Bavdek and Grant McCool)