有人 + 溺水 / 溺水 + 事故
The word 溺水 (nìshuǐ) means "drowning" or "to drown" and combines 溺 (to drown) with 水 (water). It is used in emergency and safety contexts to describe incidents where a person is submerged in water and unable to breathe. A common pattern is 有人溺水 (someone is drowning).
夏天带孩子去游泳要注意溺水的危险。
Xiàtiān dài háizi qù yóuyǒng yào zhùyì nìshuǐ de wéixiǎn.
When taking children swimming in summer, watch out for the danger of drowning.
那个男孩差点溺水,幸好被救了。
Nàge nánhái chàdiǎn nìshuǐ, xìnghǎo bèi jiù le.
That boy nearly drowned, but fortunately he was rescued.
学校开设了防溺水安全课。
Xuéxiào kāishè le fáng nìshuǐ ānquán kè.
The school has started a drowning prevention safety course.