I received an email, yesterday, from our water suppliers, asking us to be economical. They are having trouble keeping up with demand. We have a few moorland fires burning in the area. The firemen have been fighting them for days. Peat smoulders, and the fires can pop up again in new areas. They must be using vast amounts of water. The only thing that will really douse them is several days of heavy rain, and I feel sorry for the poor firemen and soldiers struggling in this heat.
I have moved all my pots of flowers and veg into the shadiest areas, and will do all I can to save water. As far as flushing the loo is concerned, the Aussies have a saying - “If it’s yellow, let it mellow. If it’s brown, flush it down!” 
I, too, have left my grass uncut, and it’s still green. My daughter’s, which gets the full blast of the afternoon sun is nothing but straw, but I’m sure that it will soon recover when the rain comes. The birds will not be rationed with their water supply, though. My two birds baths are in great demand, and four magpies have already splashed most of the water out of them this morning!