Zhè chǎng hóngshuǐ gěi dāngdì dài lái le jùdà de huòhuàn.
This flood brought enormous calamity to the area.
Tips
usage
More formal than 灾难 (zāinàn, 'disaster'). 祸患 carries a sense of an ongoing or systemic threat — something that breeds harm — not just a single catastrophic event. Often paired with 消除 'eliminate' or 留下 'leave behind.'
