The ongoing heat wave poses significant risks, particularly for vulnerable populations such as the elderly, children, and those with pre-existing health conditions. Prolonged exposure to these conditions can lead to heat-related illnesses, including heat exhaustion and heat stroke. Residents in Cook County and Chicago are under an Extreme Heat Warning, emphasizing the severity of the situation. While thunderstorms are possible over the next few days, they are unlikely to provide widespread relief. The heat is expected to persist through Friday, with temperatures remaining in the 90s °F (32-35 °C).