Rex slowly intensified to become a typhoon on the 26th, followed by reaching a peak of 135 mph (217 km/h) winds on the 28th south of Japan.

As it moved northward, it brought heavy flooding to Honshū, Japan, amounting to 13 deaths and moderate damage from mudslides across the island.

Another trough pulled the storm eastward, saving Japan from a direct hit, and Rex continued northeastward to an unusually high latitude near 50°, when it became extratropical on the 9th near the Aleutian Islands, east of the International Date Line.

Due to heavy rains caused the weather front and Rex, 25 people were killed, 486 houses were destroyed, 13,927 houses were inundated in Japan.

[1] In Tochigi and Fukushima prefectures, experienced particularly heavy rains, with daily precipitation exceeded 600mm in Nasu (August 27).