Flooding Hits Four Corners, Evacuations Across U.S. Southwest

Storm System Overview

In early October, a powerful storm complex moved across the western United States. Meteorologists point to an unusually strong El Niño pattern combined with a fast moving subtropical jet stream as the main drivers of the extreme rainfall.

Super El Niño and Subtropical Jet

The current El Niño is rated as “super” by the NOAA Climate Prediction Center. Warmer than average sea surface temperatures in the central Pacific have shifted the typical storm tracks farther east. At the same time, a subtropical jet stream, normally confined to lower latitudes, dipped into the interior of the continent. This combination funneled moist air from the Gulf of California and the Pacific Ocean into the Four Corners area, producing intense rain bands that lingered for several days.

Impact on Four Corners

The Four Corners region, where Arizona, New Mexico, Colorado and Utah meet, is known for its rugged terrain and dry climate. When heavy rain falls on steep slopes, water runs quickly into narrow canyons, creating flash floods that can rise several feet in minutes.

River Levels and Flash Floods

By the third day of the storm, the U.S. Geological Survey reported that the San Juan River in New Mexico exceeded its flood stage by more than two feet. Similar spikes were recorded on the Colorado River near Moab and on the Little Colorado near Flagstaff. In some remote canyons, water depth reached over ten feet, washing out roads and isolating small communities.

Local residents described the water as “rising like a wall”. Several highways, including portions of US‑160 and US‑191, were closed after bridges were undermined or washed away.

Evacuations and Emergency Response

State and tribal authorities activated emergency operations centers as soon as flood warnings were issued by the National Weather Service. Mandatory evacuation orders were issued for low‑lying neighborhoods in Farmington, NM and Cortez, CO. Shelters were opened in schools and community centers to house displaced families.

State and Local Actions

Colorado’s Governor ordered the Colorado National Guard to assist with road clearance and rescue missions. In Arizona, the Department of Water Resources coordinated with local fire departments to conduct swift water rescues. The Federal Emergency Management Agency (FEMA) set up a disaster assistance hotline and began processing applications for temporary housing.

Evacuation routes were marked with orange signs and communicated via local radio.
Emergency medical teams were pre‑positioned near the most vulnerable towns.
Power crews worked around the clock to restore electricity after downed lines.

Safety Recommendations for Residents

Officials emphasized that flood conditions can change rapidly, especially in mountainous terrain. Residents are urged to stay informed and to avoid driving through water.

Preparedness Checklist

Monitor local weather alerts on official apps or radio stations.
Move valuables and important documents to higher ground.
Keep a portable emergency kit with food, water, medication and a flashlight.
If instructed to evacuate, follow the designated routes and do not return until authorities declare the area safe.
Do not attempt to cross standing water with a vehicle; six inches of moving water can sweep a car away.

For additional guidance, the FEMA flood assistance website provides resources on rebuilding and insurance options.

Looking Ahead: Forecast and Climate Context

Forecasters expect the subtropical jet to remain active over the Southwest for the next week, bringing additional showers to the same regions. The U.S. Department of the Interior warned that water‑filled soils could increase the risk of landslides as temperatures rise.

Long‑term climate studies link the frequency of extreme precipitation events in the western United States to a warming climate. Researchers at the University of Colorado note that a stronger El Niño can amplify these trends, making future flood seasons potentially more severe.

Communities are now reviewing flood mitigation plans, including the construction of additional detention basins and the reinforcement of bridge structures. While the immediate danger is subsiding, the recovery effort will likely continue for months as residents rebuild homes and infrastructure.

Authorities encourage anyone affected by the floods to register for assistance, to stay vigilant for further weather updates, and to support neighbors who may still be without power or clean water.