We walk here. DC will be hot until September so I don't really have a choice. If I didnt walk Izzy he would be a crazy doggie
What I do is limit the length of walks and mostly take him out between 6:30-7:30am when its cooler. Short wallks during the day(5-10 min), then another longer walk at night between 8-9.
He would prefer to go out. So to save my carpet, we go on walks. I just make sure I don't over do it. When he's tired, he will let me know.
Last night I got home around 11pm and we had a nice walk it was only 80 degrees! Lol