Record heatwave in South Korea as temperatures soar to 42.5C

South Korea is experiencing a record-breaking heatwave, with temperatures reaching 42.5 degrees Celsius, the highest recorded in the country's history. This extreme heat has resulted in at least 19 deaths. The heatwave began recently and is impacting the entire nation. The article does not specify the exact duration of the heatwave or the reasons for the deaths beyond their relation to the heat.