The heat dome is affecting millions of residents across the United States, particularly in areas already prone to high summer temperatures. Vulnerable populations, including the elderly, children, and those with pre-existing health conditions, are at heightened risk of heat exhaustion and heatstroke. Infrastructure, such as power grids, is also under strain due to increased demand for air conditioning. Outdoor workers and those without access to cooling systems are especially vulnerable. Authorities are urging people to stay hydrated, avoid outdoor activities during peak heat hours, and check on neighbors and family members.