Weakened turf is also more likely to be invaded by weeds. If possible mow in the cool of the morning or evening. Mowing during high temperatures of midday places additional stress on the turf. Also make sure the mower blade is sharp. Dull blades tear and bruise the leaf tips.
Gardeners have two basic options on lawn care when confronted with hot, dry weather.
One option is to simply allow the turf to turn brown and go dormant. The alternate is to properly water the lawn to maintain green turf during dry weather. Kentucky bluegrass lawns can survive extended periods of drought by going dormant. Most healthy lawns can survive in a dormant state for 4 to 6 weeks without rainfall or irrigation. Healthy lawns that have been allowed to go dormant will green up again when the turf receives sufficient water.