Severe Storms Bring Flood Watches and Rescues Across US Southwest

A powerful autumn storm system brought heavy rainfall, flash flood warnings, and hazardous travel conditions to already saturated parts of the United States Southwest through the weekend. The National Weather Service issued flood watches covering nearly all of Arizona, parts of southern Utah, southwestern Colorado, western New Mexico, and southern Nevada, including the Four Corners region.

Allison Santorelli, a meteorologist with the Weather Prediction Center in College Park, Maryland, noted that the heavy precipitation posed an immediate threat. "It's not going to take much rainfall to be impactful at all in some of these locations just because of how saturated they are," Santorelli stated.

The storms disrupted Halloween weekend activities across metro Phoenix and surrounding areas, marking the first time it has rained on Halloween in the region since 1987. Rainfall totals were projected to reach 1 to 2 inches across the Phoenix valley, while higher terrain areas in central Arizona anticipated up to 4 inches of rain. The severe weather also brought unseasonably cool temperatures, with high temperatures falling into the low 70s.

Emergency responders across the region executed multiple swift-water rescues as drivers encountered rising floodwaters and washed-out roadways. In northeast Phoenix, firefighters rescued six people trapped across four vehicles stuck in a wash near 40th Street and Camelback Road. Meanwhile, Scottsdale fire crews rescued a driver from a vehicle stranded in 3 to 4 feet of fast-moving water near Hayden Road, followed by two additional occupants who walked out of a second vehicle that entered the same wash.

Dangerous conditions extended into neighboring Nevada, where emergency personnel in Henderson conducted three swift-water rescues during a heavy downpour on Friday. According to city officials, one person was rescued from atop a vehicle, two others were saved after floodwaters swept their vehicle from the road, and a fourth person pulled from a wash suffered cardiac arrest and later died at a hospital.

In western Arizona, heavy rainfall in Bullhead City left streets covered in water, rocks, and debris while forcing local park closures. The Salt River Project increased water releases from the Granite Reef Diversion Dam to manage storage levels, resulting in flooding of low-water crossings along the Salt River upstream of Tempe Town Lake, including McKellips Road.

Forecasters warned that the atmospheric river system could produce intense rainfall rates of at least half an inch per hour, elevating risks for flash flooding over burn scars, urban areas, and low spots. Authorities repeatedly urged motorists never to drive or walk through flooded roadways, emphasizing that as little as 12 inches of rushing water can sweep away most vehicles.