It's going to be 40 Celsius tomorrow here in Cairo-Egypt, if I went out for work tomorrow, would that affect me badly, as far as I know that heat is an MS enemy, so how much would that hurt me if I faced this heat tomorrow and the burning sun?!
Below is a link about heat-related symptoms and ways to minimize the impact of heat. I hope it is helpful.
Heat and Temperature Sensitivity
Stephanie, MS Navigator
It's best to try and wear some loose fitting clothes maybe a safari hat you know the type that has the back neck flap if possible try getting a cooling vest for ice packs. Besides that I don't know what else to recommend.