There are a couple of notes in the
Mavic Air Intelligent Flight Battery Safety Guidelines about batteries and heat. One note says that the battery shouldn't be used in environments above 50 degrees Celsius (122 degrees Fahrenheit) and a second important one says that the battery shouldn't be charged in environments in excess of 40 degrees Celsius (104 degrees Fahrenheit) and finally, the battery shouldn't be stored in environments above 40 degrees Celsius (113 degrees Fahrenheit).
The
Mavic Air User Manual lists the operating temperature for our drones as 32 to 104 degrees Fahrenheit (0 to 40 degrees Celsius)
There's a good thread on the
Mavic Pro on the subject with users personal experiences, photos,flights and heat mitigation techniques.
It's also worth mentioning that your motors will have to work harder to generate the same lift that they would get when it isn't as hot outside.Hotter air is less dense, which means it's more difficult to generate lift.
Airplanes are actually grounded sometimes for this same reason.
From just breezing through some of the material, it looks like a small flight isn't going to instantly melt your UAV, but it might not be a good idea to plan any sustained outings.
Good luck!