Wilting, changes in color, purpling (or moisture stress), are the beginning stages of drought. Not all grass will turn brown right away…you may notice a blueish-gray color before. This is the beginning stage of drought stress. Purpling causes grass to turn a slight purple or grayish appearance.
Dry soil. You can check to see if your soil is dry and lacking water by using a screwdriver. Simply push it into your lawn…you should be able to easily stick it 6 to 8 inches into your soil.
Thriving weeds. While grass struggles in the heat, weeds love it.