It was 97°F here in South Texas yesterday, with 73% humidity, and the heat index was a mild 105°F.
Whew! it was a tad warm in my 10' x 25' shop with no AC, and only one end open.
Well, I ran my 770 all day, balls to the wall in the heat. Knocked out 80 small parts with no issues.
The old gal didn't even break a sweat!!
Today it's cooler. Only 93°F with 58% humidity. I've been running her since 11 AM.
My coolant has turned into HOTant. (flame2)
HOT HOT HOT