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South Korea's heat-related death toll has climbed to 21 this year, already surpassing the previous year's total of 20 deaths. The Korea Disease Control and Prevention Agency reports 2,441 emergency room visits for heat illness since mid-May.
South Korea is experiencing a severe heat wave with southeastern cities setting all-time temperature records. Busan reached 38.8°C, its highest in 122 years of record-keeping, while authorities have upgraded warnings for Seoul as extreme conditions persist.
A week-long heat wave across the United States has caused at least 25 deaths, with 40 million people under heat alerts. Severe thunderstorms now threaten flooding across the East Coast through Monday.
Poland has recorded its hottest temperature on record, with mercury reaching 40.5 degrees Celsius in the western town of Slubice, breaking a 105-year-old national record that had stood since 1921.