Yes, Florida is hot in August, but every car, home, hotel, restaurant and shop is air conditioned (and very efficiently). In the theme parks there are lots of water fountains to get drinks of water, plus water sprays and misters to cool you down. I don't generally like hot weather but coped admirably in Florida last July/August. Apart from everywhere (except outside!) being air conditioned we had our own villa (again, air conditioned) which had it's own pool and jacuzzi - brilliant for keeping cool!