Melt-Down on Unintended Grinder Climb

Set off for an hour's ride at 6:15pm in 35 degrees. Had planned about an hour's ride so I could get back for the 4th set of Andy Murray semi. Got carried away and did The Grinder in reverse. I thought it wouldn't be as steep as the normal way, but it turned out to be just as tough, and with a relentless hot setting sun on me I ran out of water halfway up.  Anyway, I still loved it and the views at the top are just amazing. Got home about 8:30 and it had dropped to 23.  That's my 9th Grinder climb, and 4th solo. Starving!