National Weather Service Issues Extreme Heat Warning for Las Vegas Valley as Temperatures Threaten 110°F

LAS VEGAS, NV — An unusually stubborn late-summer high-pressure system has prompted the National Weather Service (NWS) Las Vegas to issue an Extreme Heat Warning across Southern Nevada, with afternoon temperatures projected to climb up to 110°F across the metropolitan valley floor.

The advisory remains in effect through 8:00 PM Thursday, September 10, 2026, covering the Las Vegas Valley, Pahrump, Moapa Valley, and surrounding desert lowlands. Low-lying river communities along the Colorado River, including Laughlin and Bullhead City, are facing peak heat indexes approaching 116°F.

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|          SOUTHERN NEVADA EXTREME HEAT DOSSIER          |
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|  - Issuing Agency: National Weather Service Las Vegas  |
|  - Advisory Type: Extreme Heat Warning                 |
|  - Active Duration: Through 8:00 PM Thursday, Sept. 10 |
|  - Valley Floor Highs: 105°F to 110°F                  |
|  - Overnight Lows: 82°F to 88°F (Elevated Urban Heat)  |
|  - River Basins (Laughlin/Bullhead): 112°F to 116°F    |
|  - HeatRisk Level: Level 3 (Major) to Level 4 (Extreme)|
|  - Primary Geographic Footprint: Clark County, Nye     |
|    County, Lake Mead Recreation Area, Moapa Valley     |
|  - Coordinated Response: Clark County Office of        |
|    Emergency Management & SNHD Cooling Stations        |
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Urban Heat Island Compounds Danger

Meteorologists caution that the primary hazard of this late-season heat wave stems from sustained overnight minimum temperatures.

Due to the urban heat island effect—where miles of asphalt, highway infrastructure, and high-density commercial developments trap ambient heat—overnight lows across the central valley will struggle to drop below 85°F to 88°F.

The lack of nighttime cooling dramatically elevates physiological stress on individuals without reliable air conditioning, outdoor construction crews, and unhoused residents, sharply increasing the onset of heat exhaustion and fatal heat stroke.

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|             EMERGENCY HEALTH & SAFETY NOTICE           |
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|  • Hydration Rules: Drink water before feeling thirsty;|
|    avoid dehydrating energy drinks and alcohol         |
|  • Outdoor Curfew: Shift outdoor manual labor and      |
|    exercise to pre-dawn hours (prior to 8:00 AM)       |
|  • Hot Car Hazards: Look before you lock; vehicle      |
|    interiors exceed 140°F in less than 10 minutes      |
|  • Paw Protection: Pavement surface temperatures hit   |
|    150°F+; keep pets off concrete and asphalt          |
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Emergency Response and Cooling Centers

In response to the warning, the Southern Nevada Health District (SNHD) and the Clark County Office of Emergency Management activated regional heat mitigation protocols.

Public cooling stations have been opened across public libraries, recreation centers, and day shelters throughout Las Vegas, North Las Vegas, and Henderson.

Municipal emergency medical services (EMS) have staged additional rapid-response hydration units to assist vulnerable individuals along the resort corridor and downtown transit stops.

“A temperature of 108°F or 110°F in September carries the exact same physiological threat as 110°F in July,” NWS meteorologists warned. “Heat illness is cumulative. When overnight lows remain in the upper 80s, your body never gets the opportunity to recover from the previous day’s exposure.”

Officials urge residents to check frequently on elderly neighbors and ensure outdoor pets have access to continuous shade and fresh water.

Source: National Weather Service Forecast Office Las Vegas, Southern Nevada Health District (SNHD), Clark County Department of Environment and Sustainability.