I drink water all day (but I do when it's not so hot, too) and wear very light, loose clothing. In the house, upstairs it's windows open, curtains closed. Also, if you have a hatch into your loft, leave it open. Heat rises and it will dissipate a little into the roof space. Downstairs, French windows opened wide (makes a 6' opening) and kitchen door propped open so there's a nice cool through draught.
I use SPF 12 when out and about, 15 if I'm sunbathing, and loads of Vaseline Intensive Care after showers and baths, incidentally it's a cheap and very effective "after sun" lotion for those who get a bit sore. I don't burn because I am always quite tanned, spending a lot of my time here outdoors, all year round (mad gardening woman), and I go to Malta quite a lot so I'm not covered up all Winter. I always use sun-cream, here and abroad, even when it's not all that hot.
I certainly don't have skin like leather and I've been catching the sun for well over 50 years.
