Boulder Creek swells in size after three days of heavy rainfall September 12, 2013 in Boulder, Colorado. (Dana Romanoff/Getty Images)
LYONS, Colo. (AP) - Authorities called on thousands more people in the flood-ravaged city of Boulder to evacuate late Thursday night as a nearby creek began rising to dangerous levels.
City officials say the notice to head to higher ground went out to about 4,000 people living around the mouth of Boulder Canyon after 11 p.m., according to a report in Boulder's Daily Camera newspaper.
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Boulder County spokesman James Burrus says about 8,000 telephone numbers with the message to evacuate were called, but officials aren't sure how many individuals that represents.
The city Office of Emergency Management says that the alert was prompted by rapidly rising creek levels caused by water backing up at the mouth of the canyon because of debris and mud coming off the mountainsides.
Flooding in the area since Wednesday has killed three people, cause widespread damage to homes and property and prompted numerous calls for evacuations.
(The Associated Press)