Charming
Sounds like a reasonable question to ask especially when heat is so dangerous if precautions aren't taken particularly in kids as they have demonstrated with the lack of hats, extremely red and sweaty children, not seen any time in shade or loads of water passed about.
There is no reason to send replies like that but sue will have taught her if someone doesn't agree their automatically a hater or a karen.
Millie if someone is trying to be helpful and sharing concerns about the kids try listening and taking points on board rather than name calling and sending pretty rude replies that's not what adults do.