The room was stuffy with heat.
enthusiasm; excitement; fervor
Figurative heat: a charged, passionate atmosphere created by a crowd, event, or intense activity.
The venue was filled with excitement.
Rare, somewhat literary use for bodily fever; modern Japanese normally uses 熱 (ねつ) or 発熱.
There is an old-fashioned expression, 熱気にうなされる, meaning to be delirious with fever.
The venue for the final match was filled with excitement.
Inside the packed train, the hot air was stifling.
The discussion gradually took on a heated intensity.
The concert venue was overflowing with excitement.