The heat wave is expected to affect a large portion of the US population, with the most vulnerable groups being older adults, children, outdoor workers, and individuals on certain medications. The NWS HeatRisk tool identifies five risk categories, ranging from 'little to no risk' (light green) to 'extreme risk' (magenta). Extreme heat can lead to severe health complications, including heat stroke and even fatalities, particularly for those without access to cooling or hydration. Health systems, industries, and infrastructure may also face significant strain during this period.