I came across this article the other day which I found interesting about people being bumped from flights due to the heat. https://www.cnn.com/travel/article/climate-change-airplane-takeoff-scn/index.html
The hotter it gets, the lighter a plane needs to be to take off and the problem is only going to get worse. From the article;
A study from Columbia University predicts that by 2050, a typical
narrow body aircraft like the Boeing 737 will incur increased weight
restrictions by anything from 50% to 200% during the summer months at
four major US airports: La Guardia, Reagan National Airport, Denver
International and Sky Harbor.
And apparently the weight restriction may be more than people. On an Italian Travel Facebook site this morning an American posted that they tried to check bags for the flight home and were denied because the plane had reached its weight limit and at the moment they hadn't been advised of a solution for the luggage. Very little other information was included by the poster and I can't vouch for the post's validity but it does make me start to wonder if we're going to see further luggage restrictions such as reduced weight per person.
Who has a crystal ball?...don't pack it though.