If I were a superhero, I would...

Roam the streets and parking lots, freeing all the dogs left in cars with the windows "cracked open" in the sweltering heat.

Then I would round up all the owners, put choke collars on them (who the fuck still uses choke collars???), tie their hands behind their backs so they can only use their mouths, place them in a locked car under the noon-hour sun, "crack the windows open".... No, wait... "crack only one window open" (because it seems to be enough for some dogs, right?), and then leave them there to bake while their dogs run around in air-conditioned stores.

That's what I'd do.