To protect tomatoes from excessive summer heat and sun, shade cloth can be an effective tool. A shade cloth with 30-50% light filtration is typically recommended to reduce sun exposure without completely blocking light essential for photosynthesis. The cloth helps to lower plant temperatures, prevent sunscald on fruit, and reduce water evaporation from soil. It can be set up by draping the cloth over stakes or a frame around the plants, ensuring proper airflow. This protection is particularly useful during heat waves, when temperatures rise above 85°F, which can otherwise cause tomato plants to stop setting fruit or experience heat stress.