Ooooo, I did see some fairly scary effects of the heat yesterday. We were driving to Bolletta's new flat in Sarf London (engineering works so train out) along the the bit of the A316 that passes the southern edge of Richmond ?Old Deer Park.
We could see loads of people running and a bit of the finishing area for what turned out to be the Richmond half marathon. The already slow traffic ground to a halt, unfortunately with us close to a runner that had collapsed and was receiving treatment. Even on the short stretch of the marathon route close to the road you could see some other people who were struggling.
The traffic had stopped because there were three emergency vehicles (two ambos + 1 paramedic SUV) parked up in one of the lanes further up, all on blues. A bit further on we could see another ambo on the field, also with blues, and then another 2 paramedic vehicles turned up just as we made past the main pinch point. I'm assuming that they were there to deal with mainly heat-related incidents.
Most of the runners would have been fit enough to run 13 miles in more temperate conditions, so it shows what the heat can do. I hope everyone was able to recover without long-term ill-effects.