A dangerous heat dome is currently gripping the eastern half of the United States, with extreme temperatures soaring into the triple digits in many cities, including New York and Boston. Alerts have been issued for approximately 147 million Americans across 28 states, as this heat wave continues to challenge historical records. The heat index has reached as high as 115 degrees, prompting heat advisories and warnings for dangerous conditions. Weather experts predict that the scorching temperatures will persist, with significant humidity contributing to the discomfort. The Midwest and Northeast regions are expected to experience some of the hottest weather of the year, leading to a stretch of First Alert Weather Days. Residents are advised to stay hydrated and indoors during the peak heat hours as the heat wave shows no signs of abating.