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As the weather that felt a bit cooler turns hot again, heat advisories have been reissued for most parts of the country, including Seoul.
Apparent temperatures in these regions are expected to rise to around 33°C (91°F) during the day.
Meanwhile, forecasts predict rain or showers today (the 19th).
First, 5 to 30 mm of rain is expected mainly in the Chungcheong and Honam regions until morning, and sporadic raindrops may also fall in the greater Seoul area.
Shower clouds will develop in the afternoon.
In particular, heavy showers of up to 60 mm could pour down locally in the southern provinces.
Special caution against safety accidents is required in the southern coast of Gyeongsangnam-do, where the ground is already heavily weakened.
Tropical nights are expected in some coastal areas, including Gangneung, overnight.
Today's daytime temperatures will rise to 32°C (90°F) in Seoul and 33°C (91°F) in Gwangju.
The heatwave is expected to continue for the time being.
There is rain forecast for the central regions from Friday evening to Saturday morning.
(Weather Forecaster Nam Yu-jin)