Solar flares, almost as their defining property, fill coronal magnetic flux tubes with hot plasma. When the temperature of a significant fraction of this plasma exceeds about 30×106K, we call the event ‘‘superhot’’, following the initial observation of the hard X‐ray continuum of such an event by Linetal. (11). TheYohkohobservations include many examples of similar events, of which three have been published thus far. This paper reports a survey of theYohkohobservations, based mainly on the hard X‐ray spectra obtained by the HXT instrument. While comprehensive conclusions will not be possible until the survey includes the Yohkoh imaging observations, we make tentative suggestions here about the nature of flares with superhot properties. ©1996 American Institute of Physics.