Millimetre-wave energy detectors can pick up concealed dense objects because these emit heat energy at a different rate from the human body.

All electrical appliances emit heat even on standby.

The coal embers would emit heat providing some relief in a time when automobiles did not have such options.

All thermal power plants emit heat during electricity generation, which can be released into the natural environment through cooling towers, flue gas, or by other means.

Huddled on a rocky ledge below a large patch of burnt moutainside, which was still emitting heat, the village's sheep were worst affected by the onslaught.