When is it to hot to cut the grass?

It hit 102* yesterday with more of the same expected today. Needless to say the lawn will have to wait.

Thanks Tim. That's the answer we've been looking for.

Update: after a week of extreme temps topping out at 106* there is no grass left to cut. Just a yellow dried up piece of land that looks like a desert. All that's missing is a long horned cattle skull.
It's interesting to note that of very recent times I have experienced my first earthquake, a devastating hurricane followed directly by an early October snowstorm and tornados in the middle of the country over 2 miles wide causing death and destruction. I am in my late fifties and I'm confident to suggest that something is changing in the world weather patterns.