South Korea issues its first heat wave emergency warning for Gyeongsan and Pohang in North Gyeongsang Province at 10 a.m. Sunday, marking the first activation of the highest alert level since the revised advisory system starts last month. The warning is issued for areas that have already recorded a perceived (feels-like) temperature of 35°C or higher for at least two consecutive days. For those regions, the emergency warning takes effect when forecasts indicate the perceived temperature will reach 38°C or higher, or the actual temperature will reach 39°C or higher, for at least one more day. The government says heat at those levels carries a high risk of heat-related illness. Residents are advised to avoid outdoor activities, especially during the hottest hours between 2 p.m. and 5 p.m., and to seek shelter or shaded areas. Authorities also recommend resting and drinking water or sports drinks rather than caffeinated drinks or alcohol. The emergency warning is intended to improve public communication about extreme heat compared with the previous two-tier heat wave warning.