The heatwave is raising concerns for millions of residents, particularly those unaccustomed to extreme heat this early in the year. Health risks include heat exhaustion, heat stroke, and respiratory issues, exacerbated by poor air quality. Urban areas face heightened danger due to the 'urban heat island' effect, which traps heat and keeps nighttime temperatures elevated. Vulnerable populations, including the elderly, children, and those with pre-existing health conditions, are at increased risk. Medical experts warn that even short periods of extreme heat can lead to hospitalization and, in severe cases, death.