The humidity will kill me this summer

Megan • 24, have a 6 year old girl and an amazing boyfriend! Expecting #2 November of 2015!!
It's not even as bad as it's going to get this summer, today was humid and 80. I don't know how I'm going to survive! I'm already fat! Ontop I'll be 5-7 months pregnant through the hottest parts of summer!! Tips on how to survive a summer pregnancy please