was burning, was on fire
Ce quai de la gare lui brûlait les pieds, et il ne pouvait s'en arracher.
The station platform burned beneath his feet, and he couldn’t tear himself away.
Pour Rachin, c'était son avancement qui brûlait sous ses yeux.
For Rachin, it was his career advancement that was going up in smoke before his eyes.
— Les Choristes (2004)
Il brûlait d'impatience de rentrer à la maison.
He was burning with impatience to get home.
Ça a fait un court-circuit et la pile lui brûlait le ventre.
It caused a short circuit and the battery was burning his stomach.
— Blow Out (1981)
J'ai cru sentir quelque chose qui brûlait.
I thought I could smell something burning.