Its the only thing that I can routinely point my finger at. as soon as the temperatures swing hes hit. and its usually from a colder more drizzly temperature to a hotter one. last week we were in the 60's then a couple days of almost 100 ,, he was hit a few days before the heat. Same thing the last couple days ,, and we are headed for 109 on Monday. Don't know if this helps anyone but you might keep an eye.