Weather
Southwest Flood Alert Today: Up to 3 Inches, Flash Flooding Likely Oct 11
Las Vegas, NV – Dangerous flash flooding threatens portions of the southwestern United States Sunday, October 11, as remnants of Tropical Storm Rachel bring unusually high moisture into the region, wi
By Mara Ellison · 2026-10-11T11:25:55.238Z
Las Vegas, NV – Dangerous flash flooding threatens portions of the southwestern United States Sunday, October 11, as remnants of Tropical Storm Rachel bring unusually high moisture into the region, with additional rainfall potentially reaching 3 inches in some locations.
According to the NOAA Weather Prediction Center and National Weather Service in Las Vegas, flash flooding was already occurring in parts of the Southwest early Sunday morning, with additional flooding expected throughout the day.
Moderate Flash Flood Risk Issued
Federal forecasters have placed portions of the Southwest under a Moderate Risk, Level 3 of 4, for excessive rainfall capable of producing flash flooding.
The Moderate Risk designation represents at least a 40% probability of excessive rainfall leading to flash flooding within the highlighted area.
Surrounding locations face Slight and Marginal risks, indicating that flooding remains possible beyond the highest risk zone.
Forecasters expect another 1 to 2 inches of rainfall across affected areas, with localized totals potentially reaching 3 inches.
Burn Scars and Slot Canyons Face Greater Danger
The National Weather Service warns that sensitive terrain, including recent wildfire burn scars and narrow slot canyons, will be particularly vulnerable to rapid flooding.
Heavy rainfall can produce dangerous runoff in these locations, sometimes sending water into normally dry washes and low lying roadways.
Flash flooding may also develop downstream from areas receiving the heaviest rainfall.
Residents Urged to Avoid Flooded Roads
Officials urge residents and travelers to remain weather aware and maintain multiple ways to receive emergency alerts.
Motorists should never attempt to drive through flooded roads, even when water appears shallow.
The National Weather Service emphasizes its flood safety message: "Turn Around, Don't Drown."
Anyone planning outdoor recreation, especially hiking through canyons or traveling near washes, should closely monitor conditions and avoid flood prone areas.
The Moderate Risk outlook signals a significant flooding threat, although the exact severity will vary by location.
Residents should monitor updated National Weather Service warnings throughout Sunday as additional rainfall develops.