The extreme heat poses significant health risks, particularly for those spending prolonged periods outdoors. High humidity reduces the body's ability to cool itself through sweating, increasing the likelihood of heat-related illnesses such as heat exhaustion and heat stroke. Symptoms to watch for include high body temperature, dizziness, nausea, and confusion. Vulnerable populations, including the elderly, children, and those with pre-existing health conditions, are at heightened risk. Residents in cities like Augusta and Savannah, where the heat index is expected to peak, should exercise extra caution.