Description:

A heat burst is a:

✅ Sudden increase in temperature due to sinking dry air from thunderstorms.

Explanation:

A heat burst is a rare weather phenomenon typically occurring at night. It happens when rain-cooled air from a dying thunderstorm rapidly descends. As it sinks, it compresses and warms due to increasing atmospheric pressure, resulting in a sudden spike in temperature, strong winds, and a rapid drop in humidity.

It is not caused by:

Solar flares (which affect electromagnetic fields, not direct surface temperatures).

Volcanic activity (which affects localized areas but not in the sudden and specific way a heat burst does).