With heat like that, then my guess is it had something to do with the regurge.
Thier temps need to be around 86 - 88 max. Heat like that may have made the food turn rancid inside your snake, did the regurge smell pretty ronchy?
The temps in your tank, what were you trying to keep them at?
Did you have the tank in the direct sunlight, such as under a window?
Did the store you got it at tell you to keep the temps that high?
Here's the caresheet on boas,
Boa care..
In any event, yi\ou need to wait about a week before you try to feed it again, and start with food that is a little smaller than it can handle, to go easier on its stomache.
[addsig]