The extreme heat poses health risks, particularly for vulnerable populations such as the elderly and those with pre-existing conditions. Heat advisories are in place, and residents are encouraged to avoid outdoor activities during peak heat hours. Severe thunderstorms in the Plains and Ohio Valley could bring damaging winds and hail, while prolonged rain in the Northeast may disrupt Memorial Day weekend plans. In California, wildfires are threatening air quality and property, with smoke alerts advising residents to stay indoors and limit physical activity. The Sandy Fire and other blazes in Riverside County highlight the early onset of wildfire season.