Flood Information
Flash flooding is the most common natural hazard in Colorado Springs. Flash floods tend to occur from May through September, and are usually caused by thunderstorms that are out of sight and hearing range of people downstream. Runoff from the mountains can quickly cause the water levels of small creeks and dry streambeds to rise to unsafe levels. These walls of water are fast moving and can easily reach heights of 10-20 feet. Know which streams and waterways are nearby, and where you are in relation to them.
You should never attempt to cross an area that is flooding. It only takes 6 inches of fast moving water to knock you off your feet. Just 10 inches of moving water can move a car, and 2 feet can float your vehicle. Your best course of action is to immediately seek higher ground.
http://www.redcross.org/www-files/Documents/pdf/Preparedness/checklists/Flood.pdf
FEMA Are You Ready
http://www.fema.gov/hazard/flood/index.shtm