"If you don't hold on tight to that railing, it's ...

"If you don't hold on tight to that railing, it's very easy to be washed away."

Terrified subway passengers in central China were left clinging to ceiling handles inside flooded cars as record rains devastated parts of Henan province.

At least 25 people have died in Henan, a dozen of them in Zhengzhou subway stations.

---