“人道主义危机”的英语表达是 “humanitarian crisis” 。
例句：
The ongoing conflict in the region has led to a severe humanitarian crisis, with thousands of people displaced.（该地区持续的冲突导致了一场严重的人道主义危机，成千上万的人流离失所。）
International organizations are working together to provide aid and alleviate the suffering caused by the humanitarian crisis.（国际组织正在共同努力，提供援助，以缓解人道主义危机所造成的苦难。）