Its northern district of Changping received the highest hourly rainfall on Wednesday, authorities said, being doused with 90.7mm within an hour after 9am.
The typhoon has weakened this week after travelling 6,000km to hit land on Sunday in the eastern province of Zhejiang, but its remnants are drawing tropical moisture deep inland, threatening floods.
“The most troublesome part is that it affects work and life,” said Zhao Junxia in Luohe, a city in the central province of Henan. “It’s very inconvenient for food and transport.”
Scores of cars crowded a bridge that stayed above the encroaching floods in the province’s coastal city of Yuhuan after almost 200mm of rain that submerged nearby streets, social media footage verified by Reuters showed.
State media said rainfall records were shattered in parts of Zhejiang and the central provinces of Henan and Hubei this week.
Records for a single day of rain in August were smashed in the city of Wugang, home to one of China’s largest steel companies, which received 209.5mm of rain, while Xiangyang received 169.1mm.