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That's a good question.When temperatures top 120° F (49° C) rescue helicopters are grounded because hot air provides less lift to the point that flying can become impossible.
[which makes me wonder why no one has designed high-temperature rotor blades]
It's a question becoming more important as high temperatures especially in desert and arid areas are pushing that threshold.That's a good question.
I think a lot of the reason weather stations are at airports is because the temp of the air makes a big difference.
Many of the costumes on The Wizard of Oz were bought in thrift shops at the time.
Snopes says that’s probably a story made up for publicity but there’s no proof either way. There was supposedly a letter of authenticity made by the tailor that made the coat but it or copies of it don’t exist.The coat that Professor Marvel wore, also came from a thrift shop. During filming, somebody noticed that the previous owner had marked his name inside of the coat (on the tag, or the collar, or something). The previous owner was Frank Baum, who wrote the story!
