The high heat and humidity in these cities increase the risk of dehydration and heat-related illnesses, such as heat exhaustion and heat stroke. Residents and visitors in these areas are advised to take extra precautions, especially during peak summer months. The study underscores the importance of staying hydrated and avoiding prolonged exposure to extreme heat, particularly in cities like West Palm Beach, where over half the year is spent above the National Weather Service's caution threshold of 80°F (27°C).