I have been increasing my hot weather training the best as I can. I have used my stationary bike with heat lamps placed around it and a space heater blowing in my face.
The other day I picked up my desert running hat and have been running my training runs in it to get used to the added head cover and the feel of the hat/flaps.
I have also been using the men's locker room sauna at the local gym. I tend to go in after my runs and stay between 20 minutes to 30 minutes. I start with about 5 minutes just sitting in the sauna between 190 and 195 degrees and then I get up and spend the next 15 to 25 minutes pacing back and forth or doing sit-ups(sometimes wearing a fleece jacket over my running top). I plan on increasing the length of time in the sauna to at least one hour.
Overall, the high temps are not too bad - maybe my self-created automobile sauna (windows rolled up, heater on full blast, wearing a wool jacket) might have helped a bit. This sauna is a lot more comfortable than the auto-sauna or other options.
Running near London: a 14-mile loop around Heathrow airport (LHR) - When I stay in a new place, with some time for a run, I like exploring based on what Google Maps provide, then document what I found in my Running in... se...