BULLHEAD CITY — The Las Vegas office of the National Weather Service has elevated an excessive heat watch to a warning and extended its duration from between 8 a.m. today until 8 p.m. Friday.

Daytime high temperatures could reach 120 degrees along the Colorado River from Lake Havasu to the Lake Mead National Recreation Area and 114 degrees in the Las Vegas Valley, according to the NWS.

Residents are warned to beware of illnesses such as heat exhaustion and heat stroke. People most vulnerable to heat illnesses include those who spend lots of time outdoors, those without air conditioning, young children, the elderly and those with chronic ailments.

The weather service warns to take extra precautions. Those who work or spend time outside should reschedule strenuous activities to early morning or evening hours. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight, loose-fitting clothing. Drink plenty of water. Stay in air-conditioned rooms, stay out of the sun and check up on relatives and neighbors.

Children and pets should never be left unattended in vehicles under any circumstances; in extreme heat, temperatures can reach lethal levels in minutes.

According to the NWS, highs today in the Tri-state will reach 116 degrees in Bullhead City, Laughlin and the Lake Mead National Recreation Area, 114 degrees in Needles, Mohave Valley, Topock and Lake Havasu City and 104 degrees in Kingman, Golden Valley and Dolan Springs. Overnight lows are expected to be in the mid 80s tonight and into Thursday morning with daytime highs again reaching 115 or higher during the day Thursday and Friday.

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