1. 請針對以上的題組作答，寫出正確答案並進行試題解析。（4 分)

（三）本題為英文試題，請以中文詳答。 A severe meteorological disaster impacted the Pacific Northwest of the United States and western Canada during late June 2021. The following information shows the regional temperature change and the weather maps. Please summarize and analyze the causes and possible effects of this phenomenon. （summarize the causes：3 marks analyze the causes：8 marks possible effects：4 marks）