Hundreds of people have been rescued and hundreds of homes evacuated after days of heavy rain sent floodwaters surging through the Four Corners region where Arizona, Colorado, New Mexico and Utah meet. More than 2 million people were under flood watches on 24 October, and officials warn the danger is not over.

Farmington and the San Juan River

The San Juan River sent what the National Weather Service in Albuquerque called "catastrophic" floodwaters into the Farmington, New Mexico, area on 23 October. There were 20 rescues overnight in San Juan County, and photos shared by the Navajo Police Department showed homes and roads covered by floodwaters in Shiprock, part of the Navajo Nation. Farmington police asked residents to stay home and off the roads, warning that many roadways had sustained damage. Hundreds of homes remained evacuated and without electricity, affecting some 2,000 people in and around the city of 46,000. Farmington police chief Steve Hebbe told a news conference: "This is not over, and we need you to monitor alerts."

Colorado and Utah emergencies

In Colorado, the town of Pagosa Springs declared a local disaster emergency on 23 October after severe flooding damaged roads and bridges and forced evacuations in low-lying areas, while floodwaters surrounded trailers at the Fun Valley Family Resort campground in South Fork. In Utah, officials in Hurricane declared an emergency as flooding damaged at least 130 homes and recreational vehicles at an RV park, with residents near Gould Wash ordered to evacuate immediately.

The storms also brought rare Tornado Watches: Arizona's first since October 2010 and New Mexico's first since 1998, with hail up to 3 inches near Flagstaff and four people rescued by helicopter from the roof of a pickup truck near Rimrock, Arizona.

Sources: USA Today, The Weather Channel, Fox Weather