Sorry to hear about your awful heat temps
Whenever we get the triple digit heat, I try to water my succulents twice a week either very early in the morning or at sundown. I have never soaked them in water regardless how hot it is. We do not have high humidity here, and get lots of cross breeze which I think helps the succulents, plus we get into some dappled shade at the hottest part of the afternoon. Is there a way you can provide them some shade and more ventilation. That may help them endure. Usually the succulents would begin dropping their leaves, but that is to be expected, it is trying to adapt and conserve the moisture loss, especially during the day.
