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Will Pitner is rescued by emergency workers and neighbor Jeff Writer after a night trapped outside on high ground above his home as it filled with water after days of record rain and flooding at the base of Boulder Canyon, Colorado, Sept. 13, 2013.

Boulder Creek flows at high speed next to a road closed off by debris from days of rain and flooding, at the base of Boulder Canyon, Colorado, Sept. 13, 2013.

Nick Carter shovels debris as heavy rains cause severe flooding in Boulder, Colorado, Sept. 12, 2013.

The U.S. Geological Survey said creek levels in Boulder had reached what experts call a 100-year flood level, Boulder, Colorado, Sept. 13, 2013. Photo: Scott Herron

Boulder Creek has risen to dangerous levels, threatening homes and making evacuations necessary, Boulder, Colorado, Sept. 13, 2013. Photo: Scott Herron

A woman walk past electoral campaign posters for the upcoming parliamentary elections in Tunis, Tunisia.

A woman walk past electoral campaign posters for the upcoming parliamentary elections in Tunis, Tunisia.

A couple sunbath near a sculpture by Australian artist Mikaela Castledine, titled "Gift of the rhinoceros" on Sydney's Tamarama Beach as artists from 16 countries prepare their works for the upcoming Sculpture by the Sea exhibition.

Matthew Messner looks for a way to cross the sidewalk covered by heavy rains in Boulder, Colorado, Sept. 12, 2013.

A home is stranded after a flash flood in Coal Creek destroyed the bridge near Golden, Colorado, Sept. 12, 2013.