Slow ride then hammer time

The only word for the weather here is sweltering. I think it's 95 and very humid. It's not really effecting me all that much, though, and riding feels like a great way to beat the heat rather than get beat up by it. I went out with my riding partner from yesterday. She was dogged from the heat and the previous day so we cut the route shorter to 11 miles, which we covered in about 45 minutes. One memorable descent featured big frost heaves that made the drop feel like a roller coaster. I was glad to have my mountain biking skills for that one.
I dropped off my partner with a little bit of time to spare so went out on my own. At the traffic light the driver gave me a friendly "You're nuts for riding in this weather" and then I was off. I started off with a mile of steady climbing, then headed for more of the rollers. I really wanted to get a lot out of this ride, so I pushed it hard. A steep climb up a dirt road slowed me up a bit, but then it was flat or downhill from there. I ended up doing a little under 5 (4.87?) in 15 minutes flat.
Tomorrow I'm meeting my partner again, but Wednesday she's busy and we get out early and I have a 3 hour solo ride planned. Nice.