The July record comes as the weather service said the 14 days ending Saturday were the hottest two weeks in Las Vegas history.
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The Las Vegas area has a chance of isolated thunderstorms through Wednesday.
The average of the high and low each day for July stood at a record 97.6 degrees through Saturday. Some relief might come with a chance of rain through Tuesday.
Kingman, Arizona, was also under a flash flood warning Tuesday afternoon.
There was a small chance of rain in the valley forecast Tuesday, and temperatures are expected to go back up again starting Wednesday.
The high reached 110 on Sunday, but moisture and cloud cover may make it hard to extend the streak to 11 days, says the National Weather Service.
The airport unofficially reached 100 degrees by 8:45 a.m. Satuday and rose to 115 just at 2:30 p.m. as the heat streak boils on. The record for the date was 114 in 1937.
Burn and illness cases mount as summer of extreme heat nears — and may exceed — record of consecutive days at 110 or hotter.
Las Vegas could possibly tie or surpass its all-time stretch for consecutive days with 110-degree or higher temperatures.
An isolated thunderstorm and flash flooding were reported in Henderson on Monday afternoon.
The Las Vegas heat record could be tied or perhaps broken as a prolonged heat wave suffocates entire region.
With the potentially deadly heat of July settling over the region, it’s best to be prepared to protect you and others.
The Friday forecast is for moderate ozone levels with good quality air for particulate matter, said the Clark County Division of Air Quality.
Excessive heat over the region is expected to increase a few degrees Sunday and Monday. Cooling stations remain open.
An excessive heat warning begins Saturday and runs through late Monday for the Las Vegas region.