Scared about the heat

Is anyone else worried about Monday and Tuesday? There's a weather warning in place here. It could get to 36-degrees here on Monday! I know it'll be hotter elsewhere but this is still a lot of heat to endure. I'm so scared. I don't want to be ill. Do you think it's likely I'll be ill in this heat? I'm going to try and keep hydrated and stay in, hopefully I'll be ok, but it's still scary. Don't want to end up ill and in hospital.