"Our smaller regional operations - those that use our CRJ aircraft types - will be most affected by the heat", the airline's communication specialist Kent Powell told CNN.
With temperatures approaching record highs this week in Phoenix, Arizona, American Airlines has had to cancel more than 40 flights in and out of Phoenix Sky Harbor simply because the planes can not take off.
"If one is familiar with the Arizona heat, one might has the desire to drive with oven mitten", tweeted an Arizonian netizen on Tuesday.
- In Phoenix, the 118 degrees on Monday tied the record set exactly a year ago.
"I would recommend that people do something less strenuous than to come out to the toughest hike in Phoenix in the middle part of the day", she said.
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Searing footpaths are the bane of human and beast alike in Las Vegas.
In Las Vegas, which also has seen its share of record-shattering heat, National Weather Service staffers got creative - and conducted an experiment to show just how hot it is.
"Today is the peak and then tomorrow will be a little bit cooler, but we're still expecting temperatures above 115 for Phoenix", she said.
The city's all-time high is 122 degrees Fahrenheit, which happened back in June 1990. It could get even hotter on Wednesday, with a forecast temperature of 109 degrees.
The first day of summer is forecast to bring some of the worst heat the southwestern USA has seen in years.
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This is a problem that is expected to worsen, due to the impacts of climate change. Larger jets, such as Airbus and Boeing, aren't expected to be affected by this week's heat. American Airlines spokesman Ross Feinstein said his company has also started limiting sales on some flights to manage aircraft weight for a safe and secure take-off.
Dr. Kevin Foster warned people to be extra careful around concrete, vehicle interiors and playground equipment, especially young children who have sensitive skin.
People in Phoenix were taking advantage of free elastic booties to put on their pets' paws so they did not burn on concrete and pavement. The National Weather Service has issued an excessive heat warning and its Phoenix office has said 'heat of this magnitude is rare, unsafe and very possibly deadly'.
Benjamin R. Greene collapsed Tuesday evening shortly after running the race in 107-degree heat at a Bakersfield park.
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Crew members building the Loop 202 South Mountain Freeway take a break as they try to keep hydrated and stay cool as temperatures climb to near-record highs Tuesday, June 20, 2017, in Phoenix. Roughly 40 flights in and out of Phoenix Sky Harbor airport were canceled Tuesday, according to the airport.
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