I lived in Southern France for many years. The serious tips already given are very valid. One extra, locals and myself carried around an aerosol containing water which can be sprayed as a fine mist on the face, neck and wrists. Usually can be purchased from a Pharmacy. Incidentally they are now available in the UK. Last year I was able to buy very cheaply in Saver for about £1 which is much cheaper than a regular Chemist.