His lungs still burned, but not quite so much as before.

The smoke was still bad, and his lungs were burning.

His lungs burned as if they couldn't fill with air fast enough.

His lungs burned and he felt himself sinking lower in the water.

He moved toward it, trying not to breathe, his lungs burning.

Her lungs burned as she forced herself to run faster.

He felt himself flung upon higher ground, and his lungs burned for air.

My lungs were burning before I reached the employees' entrance.

His lungs burned with the sustained effort, but he didn't break off the pace.

Her lungs burned as they struggled against the increasing pressure.