heatwave

Từ điển Oxford Advanced Learner 8th

heat·wave [heatwave heatwaves] BrE [ˈhiːtweɪv] NAmE [ˈhiːtweɪv] noun
a period of unusually hot weather

Example Bank:
•It seems likely that the heatwave will go on for some days yet.
•The demand for water rises sharply during a heatwave.
•A long summer heatwave had caused most of the crops to die.
•They said on the news the heatwave is going to continue for weeks.