It's not as hot here as it's been in some parts of the south. But the last two weeks the highs have been 5-10 degrees above normal, which in August is pretty hot.
I've still been riding but have generally limited my rides to about an hour. Even when I wait as late as possible to go out in the evenings, the temperature has still been in the mid 90s. If only I could save up some of this heat for winter.
On the plus side (from a training standpoint), rain has been a non-issue the entire summer.