Grass seeds are sensitive to high temperatures and may die due to drying. But if they are exposed to the right humidity levels, they start growing. That’s why watering your lawn more often is vital. But during high temperatures, the water can evaporate at high levels. In this case, it is good to cover the grass seeds to retain moisture. Once you apply the right cover, you will not need to water the lawn more frequently since there will be enough moisture for the grass seed to germinate.