to check someone's temperature; to measure body temperature.
子どもがぐったりしているので、熱を測ってみた。
The child was listless, so I checked their temperature.
風邪の症状がある時は熱を測ると良い。
If you have cold symptoms, it's good to take your temperature.
医師が診察の前に熱を測った。
The doctor measured the temperature before the examination.