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Extreme heat grounds almost 50 regional flights out of Phoenix

Dramatic temperatures have been recorded in Arizona, California and Nevada, reaching 120 degrees Fahrenheit or higher in some desert cities-Death Valley, Calif., hit 125 and Palm Springs, Calif., reached 121.Las Vegas has tied its record high temperature of 117 degrees (47.2 degrees Celsius) as a weather system continues to bring scorching heat to the Southwest U.S.In addition to grounding flights of smaller planes, airlines have been taking other measures on larger jets to reduce their weight because of the heat.The weather service reported a high of 119 degrees – a daily heat record in itself – but it fell short of the all-time record of 122 set in 1990.Sidewalks in many Nevada and Arizona cities were almost abandoned today as residents and visitors adhered to warnings to stay inside to avoid the extreme temperatures.Those temperatures, however, are forecast for the aptly named Furnace Creek in Death Valley, in California, with some areas expecting new temperature records on Tuesday.Authorities say people should avoid the outdoors and be in air-conditioned buildings during the heat wave.The torrid weather comes as new research found that almost a third of the world’s population experience 20 days a year when the heat reaches deadly levels.Roughly 40 flights in and out of Phoenix Sky Harbor airport were canceled Tuesday, according to the airport. Some cities, like Phoenix, broke their high temperature records two days in a row.Forecasters are also predicting a high of 116 degrees in Las Vegas and tourists are being warned to be careful outside and to stay alert.Heat waves ripple across the tarmac at Sky Harbor International Airport as downtown Phoenix stands in the background as an airplane lands, Tuesday, June 20, 2017 in Phoenix.The local Fox News affiliate in Phoenix said the cancellations mostly affected regional flights on the smaller Bombardier CRJ airliners, which have a maximum operating temperature of about 118F (48C).They eschewed the cliché of frying an egg on the sidewalk and instead left crayons outside in the sun on Wednesday, when the temperature hit 114 degrees.The National Weather Service has described the heat wave as “rare, dangerous, and very possibly deadly”.- The record-breaking continued Monday with Sacramento hitting 107 degrees, a step hotter than its 106-degree record from 1988.The study of almost 2,000 deadly heat waves worldwide since 1980 was published Monday in the journal Nature Climate Change. The primary issue is apparently that hotter air usually means thinner air, which can make takeoff an issue, depending upon other variables.Gulf carriers also tend to operate longer flights using larger planes that aren’t as limited by high heat.