[QUOTE=stapfam;12718387]Wobbly will hopefully chip in wirh something as he is in hotter climes than most of us.

Thanks for the invitation, and it'd be rude not to offer

But honestly I have nothing to offer that hasn't already been said. Hydrate plenty, use isotonics as well as water.

A possible observation. One hot ride here, the whole group was riding along fine on a hot day - we stopped for a little pause, and of a sudden the whole group was shivering and dry heaving. Had to call a bus and a trailer to get us and the bikes home. The breeze from movement and the heat which evaporated sweat made us all feel dry and comfy - but we were all cooked by the time we stopped.

Just like people in cold trouble, close to death, might take clothing off because their calibration has gone, so with hot. Plan your ride and don't trust your mid ride perception

Safe and comfortable wishes all