last month,part of Southest Asia was struck by floods,from w

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保证正确率~!
【解析】：
whose effects 指的是 the flood's effects,这是个非限制性定语从句,先行词是 flood,里面有个短语是 suffer from.句子可以这么来理
Last month,part of Southeast Asia was struck by floods,and the people are still suffering from its effects.
【翻译】：上个月,东南亚有部分地区遭遇了洪灾,灾民仍因受其影响而痛苦不堪.
祝开心~!