Seasonal weather in the Midwest can vary significantly, with summer heat and occasional thunderstorms posing potential risks to travelers. High temperatures may lead to heat-related illnesses, particularly for those engaging in outdoor activities at sites like Mount Rushmore or the Gateway Arch. Thunderstorms, which are common during this time of year, could disrupt travel plans and outdoor events. Visitors to coastal areas, such as the Cana Island Lighthouse, should also be aware of changing weather conditions near Lake Michigan. It is essential to stay informed about local weather updates to ensure a safe and enjoyable experience.