South Korea heatwave death toll climbs to 21

A total of 2,441 patients have visited emergency rooms for heat-related conditions as of Tuesday since mid-May, when authorities launched the heat-related illness surveillance system, according to the Korea Disease Control and Prevention Agency.

Although fewer people suffered heat-related illnesses this year than during the same period last year, more people died this year, with the death toll surpassing last year's total of 20.

One of the latest fatalities was a 60-year-old man, who was working outside on a farm in the county of Eumseong, North Chungcheong Province, on Tuesday.

Among the patients reported this year, heat exhaustion accounted for 61.7 percent, followed by heat stroke at 16.8 percent and heat cramps at 11.5 percent.

The state weather agency issued additional serious heat wave warnings for the greater Seoul area earlier in the day, placing 43 percent of the region under the highest alert level.

Temperatures in Seoul are expected to reach up to 39 C on Thursday, according to the agency.

Earlier, it was reported that deadly heatwave continues to scorch South Korea.