A flood happens when there is a sudden rise of water flowing onto normally dry land.
Rúguǒ yǔshuǐ zài duō yīxiē, wǒmen jiù yào fángfàn hóngshuǐle.
If it rains much more, we can expect some flooding.
Yě kěyǐ guānzhù jùfēng hé hóngshuǐ chǎnshēng.
There is also concern it could spawn tornadoes and flooding.