South Korea issued heat wave alerts nationwide for the third straight day Sunday.

The Korea Meteorological Administration (KMA) issued heat wave advisories in 22 cities and counties in Gyeonggi, Gangwon and Gyeongsang Provinces as of 11 a.m. Sunday.

Twelve areas in Gyeongsang Province including Gumi, Yeongcheon, Milyang and Daegu were placed under heat wave warnings.

Heat wave warnings are issued when the daily high is expected to stay above 35 degrees Celsius for two consecutive days. An advisory is put in place when the daily high is forecast to sit higher than 33 degrees Celsius for two days in a row.

The KMA issued this year’s first heat wave warning for Gwangju, Jeolla Province on Friday.

The weather agency forecast the sweltering heat will continue for a while.