Suzanne asks on Facebook

Can you please post on WHEN and HOW MUCH is the best time to water your lawn in this heat wave?

In a drought, lawns still need 1.5 (one and a half) inches of water per week. This is the best way to measure how much you are watering. I prefer to give them a good soaking all at once, rather than in small doses;  in other words, once a week, rather than every day. Early morning is best since there will be less water lost to evaporation. If you carefully look at your lawn, you can see the signs of drought stress. The grass blades will tend to fold up to preserve moisture. The look of the lawn will be different.

see general watering guidelines in Lawn Library.