Definitely. The hotter the better, even moreso closer to the afternoon peak heat hours. If it's so hot I think I might blister, then I do bring along a pair of flip flops in a waistpack but also do not start out wearing them.
I always "pre-heat" the feet by standing full-foot down on the asphalt as long as possible before needing to go to sidewalk or shade. I only burn them as long as it takes just for the soles to start tingling, but no more. After pre-heating, the soles are red and slightly stinging but they are good to go for more walking and standing.
For prolonged standing, I'll generally start full-foot on both feet as long as the feet don't start to tingle. As the feet burn to the point of tingling, then I start doing heat relief. If I can hold onto something to keep a better balance, I'll do heat relief by alternating feet: 1) the foot that was burning too much in the air to cool off while the other foot is still full-foot down on the asphalt, then changing feet when that foot burns too much; or 2) if it's too hot to keep the other foot down full-foot, then I'll have that foot down on the edge of the foot when the other is in the air. If there's nothing to hold onto for better balance, then I generally do rolling on both feet at the same time--standing on the edges of the feet, rolling to the balls of the feet and toes, rolling back to the edges of the feet, rolling to the heels (that burn the least quickly but it's also harder to balance for longer). Only if alternating feet and rolling on the feet are too hot will I find a cooler surface or shade for additional heat relief, but then only for the immediate burning to stop.
Then I'll do walking after standing. This retains much of the heat from standing, but the first few steps are very slightly cooler than standing still. If the heat equalizes while walking--even if it remains painfully burning hot--then I am good for a longer distance before needing heat relief. If the heat continues to increase--then I'll start walking faster and "toe-flicking", where the foot and toes are flicked up in the air to cool off after each extremely hot step. If all those still burn to constant and increasing foot tingling, then I'll still seek a cooler surface before shade.
As a last resort, when a cooler surface or shade is way too far away--then I'll put on the flip flops to wear only until the immediate burning of the feet stops before taking them off again.
Blisters can occur when trying for much hotter asphalt standing and walking during afternoon peak heat hours, but if I want to push through a heat limit then I take the attitude that if the feet blister, then they blister--as long as I'm not getting third degree burns. I only need four days to start healing: the same day to drain them and wear socks if I have to do a lot of walking, the next day if I have to redrain them but I don't have to wear socks even if I have to stay indoors, the third day to start barefooting again but on much cooler and smoother surfaces, and the fourth day to start getting into rougher and hotter surfaces once again. Only once did I ever get blisters over blisters; otherwise, the parts of the foot that blistered became just as heat tolerant as the other parts. The warning sign I have found for blisters is when the constant tingling starts to go away to a pinching feeling--if that pinching feeling feels watery afterward, then blisters have occurred even if they don't get larger right away.