On August 22, the storm attained its peak intensity as a Category 2-equivalent typhoon on the Saffir–Simpson hurricane scale with winds of 165 km/h (105 mph) and a barometric pressure of 966 mbar (hPa; 28.53 inHg).
[2][nb 1] Additionally, the Joint Typhoon Warning Center (JTWC) classified the system as a tropical storm.
[1] The cyclone gradually strengthened to typhoon status on August 21, by which time it had developed a 32 km (20 mi) wide eye.
After passing roughly 75 km (47 mi) south of Taiwan, known as Formosa at the time, Iris started weakening.
[1] On August 21, Typhoon Iris brushed the northern coast of Luzon; however, there were no known reports of casualties or damage on land.
[8] Across Fujian Province, torrential rains from the typhoon led to catastrophic flooding that killed at least 720 people, injured 618 and left 996 others missing;[1][9] however, according to the National Oceanic and Atmospheric Administration, the death toll may be as high as 2,334.