She's at her best when 'the heat is on'. [=when she feels a lot of pressure; when she needs to finish something quickly]
She said things in 'the heat of the moment' [=when she was angry for a short period of time] that she later regretted.
The company has 'turned up the heat on' [=has put extra pressure on] its employees to finish the job quickly.
(..) You were right. Go ahead, call Building Services. Tell them it was my fault. No, we're both to blame. You know, let me take the heat on this one. Yeah, just leave me out of it. You know if they come here and see crap everywhere, they're just gonna blame the Indian guy. (..)2014 TvShow: The Big Bang Theory Title: The Clean Room Infiltration Season: 8 Episode 11