PHOTOS Cold spell, heavy snow hit Korea

The photo shows cracks in a KTX bullet train's window during operation. According to KORAIL, the operator of KTX, 30 windows weakened by the cold were cracked by pebbles during operation between Cheonan-Asan Station and Gwangmyeong Station, Saturday night. Yonhap

A man removes snow from his car after heavy snowfall in Gwangju, Dec. 17. Yonhap

Drivers inspect the situation after a collision on a snow-covered road in Gwangju, Dec. 17. Yonhap

A man walks on a path at Chonnam National University campus in Gwangju after heavy snowfall, Dec. 17. Yonhap

A snowplow removes snow from a road on Jeju Island amid a heavy snow warning, Dec. 17. Yonhap

A fire department vehicle, rear, approaches two vehicles stranded on a road in a mountainous area of Pyeongchang, Gangwon Province, Dec. 16. Courtesy of Gangwon State Fire Headquarters

Pedestrians are bundled up while walking through downtown Seoul's Myeong-dong, Dec. 17, when the morning temperature fell below minus 10 degrees Celsius. Yonhap

Icicles hang on tree branches at the banks of the Han River in Seoul, Dec. 17. Yonhap