A record heatwave spreads across the Korean peninsula, with extreme temperatures that were initially concentrated in South Korea’s southeast moving into wider areas, including the Seoul metropolitan area, according to weather forecasts cited by multiple outlets. The heat is described as unprecedented, with forecasters warning that conditions are worsening as the hottest spell extends to additional regions. In response, South Korean authorities activate emergency measures aimed at reducing health risks from the extreme temperatures. These actions include preparations for heat-related incidents and heightened public safety efforts during the peak of the heatwave. The reporting indicates the situation is being closely monitored as meteorological agencies track the heat’s movement and intensity. The emergency response reflects concerns about potential impacts on vulnerable groups, including older people and those with health conditions, during prolonged exposure to high temperatures. No specific casualty figures are mentioned in the provided excerpts.