South Korea issues its first-ever emergency heatwave alert under a warning system introduced this year, as heatwaves become longer and more intense, officials say. The emergency advisory applies when forecast conditions meet specific temperature thresholds. An emergency alert is issued for areas expected to reach perceived temperatures of 38°C or an actual temperature of 39°C for at least one day. The alert urges residents to reduce or halt outdoor activities and take steps to stay cool. The new rating system is designed to improve public preparedness and response as the country experiences more frequent, severe episodes of extreme heat. Under the framework, authorities provide graded warnings based on predicted heat levels, with the emergency category signalling the highest level of risk. Officials say the system is intended to help people and communities plan for dangerous heat conditions and limit exposure during affected periods.