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5 things you need to know about Colorado’s 1,000 year flood (with epic photos)

Colorado’s Front Range has been ravaged by heavy rain and flooding since last week, with 15 counties now impacted: Boulder, El Paso, Larimer, Adams, Arapahoe, Broomfield, Clear Creek, Denver, Fremont, Jefferson, Logan, Morgan, Pueblo, Washington, and Weld counties. Updates on the number of fatalities and missing is being updated but the latest reports are four confirmed dead and two presumed dead. More than 11,000 people have been evacuated and many thousands more are waiting for help.

Here’s what else you should know.

1. It’s really, really, big.

Rainfall totals across impacted counties vary, but there's been enough precipitation that the event is being called a 1,000-year flood. Andrew Freedman writes for Climate Connection that the “average yearly rainfall in Boulder is 20.68 inches.” A map of rainfallin the Denver Post shows that from Monday, September 9  to Sunday, September 15, over 15 inches of rain has fallen in the Boulder area.

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