A long-lasting weather pattern is sending waves of hot air across the eastern U.S., with cities including New York, Philadelphia, and Washington, D.C., at risk of record-breaking temperatures this Wednesday. Temperatures could reach up to 94°F (34.4°C) in D.C. and 92°F (33.3°C) in Philadelphia. The warmth is stemming from a high-pressure system, which will linger into the weekend. Meteorologists note that even though humidity levels will be lower, this early heat can impact health as many have not yet acclimatized. The National Weather Service highlights the need for vigilance, particularly for vulnerable populations.