a period of unusually hot weather 酷热期；热浪 Extra ExamplesTopics Weatherc1A long summer heatwave had caused most of the crops to die. 夏季漫长的热浪导致大部分农作物死亡。 The demand for water rises sharply during a heatwave. 在热浪期间，对水的需求急剧上升。 They said on the news the heatwave is going to continue for weeks. 新闻报道说热浪将持续数周。