Morbid obesity was the underlying cause of death
No one else died, honey. Immediate cause and underlying cause (root cause) are different, and important. If they had not been morbidly obese, they would not have died.
The death certificate likely includes both obesity and heat stroke.
Go back to whatever you came from.
Unfortunately, politicians would never allow mental healthcare in the United States. Most of them would never get elected if everyone was not suffering some kind of psychosis