Typhoon Chanthu is approaching Jeju Island, flooding roads and causing damage to the area.
According to the local weather agency, parts of the island were seeing heavy downpours of 50 millimeters per hour at 6 a.m. Friday, with strong winds of 30 to 40 meters per second.
Local authorities received 16 reports of flooding between 12 a.m. and 6 a.m.
No casualties have been reported so far.
About 60 damage reports have been filed since Monday when the island came under the indirect influence of the typhoon.