An early-season heat wave is set to grip the eastern United States this week, with temperatures soaring to near 90°F (32°C) in many areas. The heat surge is expected to peak from Tuesday to Thursday, bringing summer-like conditions much earlier than usual. From the Ohio Valley to the Northeast, residents can expect temperatures to climb into the 80s and 90s, potentially breaking records. Cities like Washington, D.C., and Philadelphia are forecast to experience near-record or record-breaking highs.