South Korea’s weather agency, the Korea Meteorological Administration, announces a major overhaul of the country’s national weather warning system, the first such restructuring in nearly two decades. The update, set to take effect on June 1, replaces parts of the current two-tier advisory structure introduced in 2008. A central change is the creation of a highest-level alert for “extreme heat emergency,” designed to respond to hotter and more persistent summer conditions. Under the new system, an “extreme heat emergency” is triggered when the forecast daily perceived temperature reaches a defined threshold; the reports describe the perceived heat measure as accounting for conditions such as humidity rather than relying only on air temperature. The change also reflects recent years in which extremely hot days, “tropical nights” (when temperatures stay at or above 25°C from late evening to early morning), and intense rainfall have become more common. The government’s stated goal is to improve the timeliness and severity of warnings as weather patterns shift.