Damn, sorry to hear that. Really hoped you had a handle on this. Wish I had more to offer, Good luck. Certainly does sound seizure like. Problem is that if there was a small stroke due to a bubble thrombus, that could have resulted in a focus for future seizures, at least in humans. Have no idea how heat would positively affect that, positive response to heat suggests possible parasitic source of CNS irritation and makes a bacterial or viral source much more unlikely. In addition bacterial CNS infections usually are rapidly fatal, viral not as much.
The sequential nature of this does suggest an infectious cause rather than environmental. I wish I had a good idea what the magic bullet treatment is but other than referring back to some of the stuff tried as described in prior threads, no great ideas.