但是乌干达传统的种植季节飘忽不定，他很担心干旱或者暴洪会毁掉他的这些幼苗。
But Uganda's traditional growing seasons are shifting, so he is worried about droughts or flash floods that could destroy his crop.
叶明飓风引发的暴洪在2007年7月初袭击了沿海地区，造成了至少730人死亡。
At least 730 people died as a result of flash floods triggered by Cyclone Yemyin, which struck coastal areas in early July 2007.
地面被浸透以后，水流就无法渗入土壤中，而是开始迅速流入河流和小溪，这会造成水位上升继而引发暴洪。
When the ground become so saturated that water can no longer seep into the soil, it begins to run off quickly into rivers and streams and this causes a rise in water and a flash.
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