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Past decade. that marks a significant increase from the ten years before that. according to this government report, its because of global warming. kim? >> yeah, not the first time we hear these devastating effects of global warming. celina wang in tokyo, well come back to you as developments warrant. thank you so much for that. appreciate it. cnn meteorologist derek van dam joins us with more on the extreme weather conditions that led to the mudslide. you heard celina there. take us through th...