Mower Scorch is a condition that occurs when heat and drought conditions are present on a lawn that is ridden on by heavy equipment. Once the turf receives moisture, areas that were not traversed by the machines will green up quickly while those that were ridden over do not. The weight of the machine, coupled with the stress, causes the grass to be “crushed” beneath it. This results in a green lawn with brown streaks running throughout it. Most mower scorch will recover with regular watering.