I ordered a bottle of 18 yr old Highland Park and 10 yr old Springbank from a distributor in Illinois. The package was supposed to arrive next Monday (25th June) and according to the distributor and Fedex would require an adult signature. "Great" I thought, my wife would be home to sign and get the bottles in out the hot Arizona sun (we live east of Phoenix).
To my horror (or delight

), I got back from work today (Friday) and Fedex had delivered the package early. No-one was home to sign for the delivery, and my whisky had been sitting in direct sun at 112 degrees for four hours!
Anyway, I opened the box, none of the bottles are cracked, but one has obviously seeped through the cork stopper, and both bottles were very warm to the touch.
OK, so could this heating have been deleterious to the whisky contained within?
Thanks,
Charlie