Arizona is in the car-centric USA. You walk straight from your car with AC into a shop with AC via the shortest path possible.
Spain, like most Europe is a lot more pedestrian/cyclist friendly and I'd imagine that traffic drops off a lot during the heat of the day.
I live in Canada which isn't anything near as hot as Arizona or Spain and I walk/cycle everywhere and I specifically avoid going anywhere from 11am-2pm in July/August if I can help it. sample-size=1, your mileage may vary.
Spain, like most Europe is a lot more pedestrian/cyclist friendly and I'd imagine that traffic drops off a lot during the heat of the day.
I live in Canada which isn't anything near as hot as Arizona or Spain and I walk/cycle everywhere and I specifically avoid going anywhere from 11am-2pm in July/August if I can help it. sample-size=1, your mileage may vary.