Catastrophic Flash Flood Emergency Issued in New Mexico Amid Imminent Dam Failure

A catastrophic Flash Flood Emergency is in effect for Doña Ana County, New Mexico, after operators reported the imminent dam failure of McLeod Dam on Tuesday. Heavy rains from tropical storm remnants threaten downstream communities, including Salem, Garfield, and Rincon. Officials are urging residents in low-lying areas to evacuate immediately via Interstate 25 as floodwaters continue to rise.

Emergency response active in New Mexico amid imminent dam failure warnings

Evacuations Ordered Due to Imminent Dam Failure

On Tuesday afternoon, the National Weather Service issued a rare "Particularly Dangerous Situation" alert following reports of structural compromise at McLeod Dam in northwestern Doña Ana County. 

Built in 1953, the 25-foot-tall earthen dam had already been classified in "poor" condition with a "high" hazard potential during a 2023 inspection. 

Water levels rapidly spiked following intense localized downpours. 

To make matters worse, severe runoff caused the nearby Rincon Arroyo to breach levees close to the local water treatment facility.

Local emergency management officials immediately activated the structured "Ready, Set, Go" evacuation protocol:

• GO Phase (Evacuate Now): Residents in Rincon, Salem, and Garfield are ordered to seek higher ground immediately. Drivers should utilize Interstate 25 as the primary northbound and southbound route.

• SET Phase (Be Prepared to Move): Areas directly adjoining low-lying drainage channels must stand by for instant relocation.

• READY Phase (Gather Supplies): Residents in the nearby town of Hatch are advised to pack prescription medications, essential legal documents, and emergency pet supplies.

Emergency shelters have opened at both the Radium Springs Community Resource Center and the Doña Ana Community Resource Center. 

The American Red Cross is on site providing temporary lodging and essential supplies. State police and county deputies continue patrolling Highways 187 and 390 to assist motorists stranded by fast-rising water.

Residents evacuate high-risk zones near Hatch following the imminent dam failure alert

⚠️ Stay Alert: Residents near Doña Ana County can track localized precipitation totals and live storm movement through the Doña Ana County Interactive Weather & Radar Tracker.

Tropical Storms Fuel Severe Downpours

The sudden integrity failure at McLeod Dam is not an isolated event. It stems from a massive influx of tropical moisture surging out of the Pacific Ocean. 

The remnants of Hurricane Polo made landfall in Baja California before pushing northward into the desert Southwest. 

At the same time, Tropical Storm Rachel continues churning off the western coast of Mexico, channeling additional moisture inland.

This double atmospheric punch has triggered slow-moving thunderstorms over land already saturated by earlier summer monsoon activity. 

In many places, rainfall rates exceed 2 to 3 inches per hour. 

High winds reaching 50 to 60 mph have accompanied the downpours, leading to downed power lines and dangerous driving conditions across rural roads.

Heavy tropical rains overwhelm McLeod Dam, triggering imminent dam failure concerns

The danger extends far beyond the immediate risk zone in New Mexico. 

Over 150 million people across more than 30 states face an escalating weeklong flood threat as this tropical system pushes eastward. 

Forecasters estimate nearly 80 trillion gallons of rainfall could drop across a corridor stretching from Texas to Minnesota. 

Level 3 out of 4 risk zones now cover vast swathes of the Southern Plains and Central Midwest. 

Ground conditions in places like North Texas remain dry and brittle, leaving them prone to rapid surface runoff. 

Emergency managers nationwide urge travelers never to drive through submerged roadways.

References

1. FOX Weather

2. KTSM

3. KVIA

4. KOB