I’m just not sure I see the symptoms of Parkinson’s with Hillary. Perhaps some kind of seizure disorder.
We have had several friends and in laws with PD, and like you, we are not sure that Illiarily has PD.
Her problems with even mild heat may indicate that she has MS.
If she has MS, that would explain why she wears those shower curtain drapes over her body to conceal the MS cooling vest to help her deal with even normal temps like at the 9/11 event.
If she is having seizures, that can be anothe indicator of MS.
Epilepsy is more common in patients with multiple sclerosis (MS) than in the general population, occurring in 2-3% of patients. Convulsions may be either tonicclonic in nature or partial complex. In these individuals, seizures most likely result from lesions present in the cerebral cortex and subcortical white matter.
Jacksonian seizure as the relapse symptom of multiple sclerosis - NCBI
https://www.ncbi.nlm.nih.gov/.../PMC37...National Center for Biotechnology Information
I think what you describe is a more likely possibility.