Round 4 of another Tour Mont Blanc underway this week. Scorching temperatures with 30 plus degrees C in the valleys. Friday when we set off being the worse, I downed 8 litres of water between Les Houches & Les Contaminnes. We've enjoyed hot sun for 3 days. My group of 9 coping well in the heat, especially since we carry everything on our back for 8 days. This season in the Alps I've worn waterproofs for just 2 days out of 45, not bad.