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United States – More than 100 million people in major metropolitan areas along the U.S. East Coast are expected to face potentially record-breaking early June temperatures starting early this week, according to National Weather Service data. Forecasters report that an expansive ridge of high pressure, forming a large heat dome, is forecast to move into the East Coast corridor within the next 24 to 48 hours. The system is projected to push temperatures above historical norms for this time of year, with several locations from the Mid-Atlantic to the Northeast at risk of setting new daily high-temperature records. Authorities warn that the combination of extreme daytime heat and elevated humidity could significantly increase the risk of heat-related illness for residents who are exposed for prolonged periods. United States – Cities from the Mid-Atlantic to the Northeast are under heightened alerts as health departments issue guidance urging residents to limit outdoor activities during peak heat, stay hydrated, and check on vulnerable neighbors, including older adults and people without reliable access to air conditioning. Local governments are promoting the use of cooling centers and other public facilities as safe places to escape the heat, particularly during afternoon and early evening hours. Officials expect little relief at night, as overnight temperatures are forecast to remain unusually warm. Power grid operators are closely monitoring electricity consumption as air conditioning demand climbs, while emergency management agencies coordinate with hospitals and first responders to prepare for a possible increase in cases of heat exhaustion and heatstroke.

Prepared by Olivia Bennett and reviewed by editorial team.