Residents and visitors in Miami should prepare for high heat and humidity, with heat indices surpassing 100°F (37.8°C). Prolonged exposure to such conditions can lead to heat-related illnesses, especially for vulnerable populations such as the elderly, children, and those with pre-existing health conditions. Afternoon thunderstorms may bring localized heavy rainfall and gusty winds, which could disrupt outdoor activities and cause minor flooding in low-lying areas.