such a critical time meaning in Chinese

值此危急之秋

The day the relief team members left the beautiful island of grenada , their driver , a local grenadian , told them that many people from his community had asked him to convey their gratitude to the supreme master ching hai for her timely help during such a critical time
在离开这个美丽的岛屿当天，载送我们的当地司机告诉我们，他的社区居民请他代为向清海无上师表达万分的谢意，感恩她在最紧急的时刻向所有灾民伸出援手。