Hot and humid weather is prime for fungal disease in fescue turf. Look for brown spots in the lawn, they are typically round spots but they can appear oblong as well. If you think you have fungus, take a pic of your lawn and email it to us to diagnose. Fungicide treatments can be applied.
Ways to avoid fungal disease: Always water in the morning so the grass blades can properly dry, and keep the grass height at least 3.5″ or taller.