Translation Revision
A.Correct or improve the translation of the following English sentences. 

原文：For weeks, central Russia has been in the grips of its worst-ever heat wave, which has caused probably thousands of fatalities.
译文：几周以来，俄罗斯中部地区深陷于历史上最严重的、已造成可能高达数千人死亡的热浪之中。