Too hot for some planes to fly: * https://www.npr.org/sections/thetwo-way/2017/06/20/533662790/its-too-hot-for-some-planes-to-fly-in-phoenix https://www.npr.or

Too hot for some planes to fly: * https://www.npr.org/sections/thetwo-way/2017/06/20/533662790/its-too-hot-for-some-planes-to-fly-in-phoenix https://www.npr.org/sections/thetwo-way/2017/06/20/533662790... * https://www.azfamily.com/2023/07/20/how-extreme-heat-can-impact-your-flights-out-phoenix-sky-harbor/ https://www.azfamily.com/2023/07/20/how-extreme-heat-can-imp... Air is no longer dense enough: * https://en.wikipedia.org/wiki/Density_altitude https://en.wikipedia.org/wiki/Density_altitude * https://skybrary.aero/articles/density-altitude https://skybrary.aero/articles/density-altitude * PDF: https://www.faasafety.gov/files/events/NM/NM07/2023/NM07120280/FAA-P-8740-02-DensityAltitude.pdf https://www.faasafety.gov/files/events/NM/NM07/2023/NM071202...