Already wet rings were coming up under his arms, and the night's heat was stifling.

Only two hours into the day and already the heat was stifling.

In the summer months, said Mahmoud the guide, the heat is stifling.

The heat inside the compartment was stifling, but it didn't seem to be getting any worse, at least for the moment.

In the summer the heat and dust are stifling.

The heat inside the carriage on that sunny day was stifling.

There did not seem to be any air-conditioning in the building and the heat was stifling.

The heat was stifling from both the heaters and the number of bodies.

The heat in the tiny control cabin had been stifling by then.

The heat upon his robes was stifling, and he felt himself gasping for air.