The National Weather Service has issued an Extreme Heat Warning for Clark County and southern Nye County, in effect from 10 a.m. Thursday, July 23 through 8 p.m. Monday, July 27, reports KTNV.

Forecasters expect dangerously hot conditions across the Las Vegas Valley for five straight days.

Afternoon highs are forecast to climb into the 108 to 114 degree range in the valley, with temperatures topping 115 along the Colorado River Valley.

Overnight lows will only drop into the low 90s, which means dogs get almost no relief even after dark.

What This Means for Your Dog

Pavement is the most immediate danger. When air temperatures reach 110 degrees, asphalt in direct sun can approach 160 degrees, hot enough to burn a dog’s paw pads in under a minute.

Use the seven second test before every walk. Press your palm flat against the pavement, and if you cannot hold it there for seven seconds, your dog cannot walk on it.

Walk before 8 a.m. or well after sunset, stick to grass and shade wherever possible, and carry water for your dog on every outing. Offer water every 15 to 20 minutes, even on short walks.

Watch for excessive panting, heavy drooling, stumbling, or a dog that suddenly stops and lies down.

Those are warning signs of heat exhaustion, not rest breaks, and they call for immediate air conditioning and a call to your veterinarian.

Never leave a dog in a parked car, in a backyard without shade and water, or tethered outside during this stretch. Flat faced breeds, senior dogs, puppies, and overweight dogs are at the highest risk.

Clark County has activated cooling stations at community centers, libraries, and other public buildings across the valley as the heat builds.

Forecasters also put thunderstorm chances near 50 percent for Friday and Saturday, which can add humidity that makes it even harder for dogs to cool themselves by panting.

The valley has already hit 111 degrees this month on July 8, the hottest day of 2026 so far. The average high for late July is 105, and no records are expected to fall during this warning period.

This is the second Extreme Heat Warning to hit Southern Nevada this year, following the record breaking March heat wave that brought the first triple digit reading ever recorded in that month.

Unlike March, dogs have now had months to acclimate to summer heat, but a five day stretch above 110 remains dangerous for even the most heat adapted pets.

Summer heat has become a defining challenge for dog owners across the valley, with local families calling for more indoor dog parks as safe outdoor options shrink each summer.

For a deeper look at heat safety from a local veterinarian, see our interview with Dr. Espinosa on summer heat safety.