Wish I read the advice on diabetes and hot weather. Got a high of 12 yesterday afternoon sitting in the sun, started to panic as I needed to drive home.drank plenty of water but it didn't have much effect. Today I've been in the 9s again panic and drinking water but after a check on DIABETES.CO.UK the answer was there. Spent an hour in a cool room with bottle of water and 5.4 mmol. Relieved to be back in the normal numbers.