Gotta love the judgement.
I have spent time in countries where it regularly hits the temperature we saw today. Street dogs walk on tarmac there. In the sun. They don't melt.
Admittedly they are acclimatised to the heat, but our two have been sunbathing in the conservatory for the past however many weeks, and are not struggling at the moment. They are young, fit, not overweight and have sensible muzzles.
They were out for 45 mins at 6.30 this morning. They had 10 minutes in the shade at noon. They had 20 minutes in the shade at 4pm. They have voluntarily gone into the garden and not wanted to come in several times this afternoon.
I wouldn't go and do loads of training in full sunlight, but a short shady walk, with a short drive home and water available... They're fine.
And having been told of the 7 second rule, I tried holding the back of my hand on the hottest tarmac I could find at 5pm. No problem. I'd just walked on it barefoot for 200 metres so didn't think there would be.
Can we just stop with the hysteria? Yes, be very cautious if your dog is old, fat, or unfit, had a short nose, or a known health issue, or a heavy coat. Don't spend 20 minutes lobbing a ball in full sun. But if your dog is young and fit, a short shady walk should be fine