@angielewis1959, I can relate to your balance issues along with not like hot weather much although it's better than my normal winter weather. I have degenerative disc condition along with old age, arthritis and neuropathy which I'm sure play a part in my balance issues. It might be a great question to ask your doctor but I think it might also be better to ask what can be done to help with the balance problem and heat sensitivity you may feel. Here's some information I found that sort of sums up what I think might help answer your question.

-- Feeling off balance? A nerve condition may be to blame: https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/feeling-off-balance-a-nerve-condition-may-be-to-blame

Are you able to talk with your doctor to see if they may have some suggestions?