Sounds like it just got sunburned ;-) Mowing a lawn too short in hot weather will do that.

It will grow out of it. And keep the grass height to 2.5 - 3 inches - no scalping!!

Thanks all, we’re watering aggressively now and skipping a few weeks of mowing to let it rebound.

I never water my lawn and it never looks like that until mid August after going a good 3 months without any water or irrigation - this is a recurring summer drought area.

And a lawn will not grow out a sunburn from scalping in just a week. It will grow out of it but it doesn't happen that fast.

Where do you live and what kind of grass do you have?

Northern Va. Fescue. This is a new build (Dec) with new sod. Thx!

Okay, thanks. That's perfect.

How have you been watering it? How long and how often throughout this growing season?