I am 71 years old and last summer I started to become intolerant to the hot weather. I m doing the same thing this year. When it gets hot I get nausea, sleepy, extremely tired. This has never happened to me before last summer. I consider myself in pretty good health. I am pre- diabetic, (I keep my numbers good), I have some arthritis. and sometimes I get dizzy.I keep myself busy with raising two grand children, take care of a granddaughter on disability, and I have an 88 year old husband who has dementia and a lot of other problems,