HSK V7-9
Correct

升温

/ shēngwēn / 
Strokes

Definition

to become hot/temperature rise/(fig.) to intensify/to hot up/to escalate/to get a boost

Example

As a Verb
elevate temperature; heat up
1
Liǎng
两
guó
国
zhījiān
之间
de
的
shézhàn
舌战
shēngwēn
升温
  
。

War of words between the two countries heated up.