Climate change, wildfires, and a mega drought are factors that caused the Colorado River Basin water levels to drop to historic low. RELATED: Dozens missing after flooding in Virginia | USA TODAY https://bit.ly/3Pe13dc » Subscribe to USA TODAY: http://bit.ly/1xa3XAh » Watch more on this and other topics from USA TODAY: https://bit.ly/3KtpSjh » USA TODAY delivers current local and national news, sports, entertainment, finance, technology, and more through award-winning journalism, photos, videos and VR. #colorado #coloradoriver #climatechange