With heat advisories in effect across most regions, forecasters said the heat would persist the next day, Kyunghyang Shinmun reported, as daytime temperatures climb and feels-like readings run higher.

Authorities said high humidity would keep it feeling hotter than the actual temperature—'sweltering' heat—with scattered showers possible.

Sustained heat advisories raise the risk of heat illness; authorities stress basics such as avoiding midday outdoor activity, staying hydrated and protecting vulnerable groups.

The elderly, outdoor workers and children are especially vulnerable; among Korea's Chinese small-business owners, those working outdoors or in kitchens should take particular care.

Authorities will keep monitoring the heat and respond further if needed, with frequent checks of weather information advised.

We convey daily-safety information accurately, pairing the forecast with coping guidance so as not to heighten anxiety.