Some dogs heat up faster than others. Heat stroke (which if I remember right is around 107 temp--you were very lucky) can happen, and does here in Texas during an early morning walk. I know several dogs have died from heat stroke, and quite a few almost died.
Interesting that Winslow and Bodie overheat quickly and need to be cooler than most dogs. Glynis said Winslow has a broken thermostat since chemo. He lives in a/c with his personal "fanny" on 24 hours a day!
Here are a couple of threads for newcomers that are interested in information:
http://forum.greytalk.com/index.php?showto...;hl=heat+stroke
http://forum.greytalk.com/index.php?showto...;hl=heat+stroke
http://forum.greytalk.com/index.php?showto...;hl=heat+stroke
If you can cool the dog down just before getting to the vets, you have a better chance of the dog surviving--but, you have to use common sense. If the vet is one minute away, don't take the time. 20 minutes away, you need to start cooling down then get to the vet--hopefully one person can be cooling while one is driving which would be the best scenario.
Of my guys, Huston is my hot little guy--he loves the heat and he is also smart about it. Pablo is my cold guy--hates the heat and will lie down in the yard outside when it's 50 degrees out! The others fall somewhere inbetween those two.