If R is an h-local domain, then
the hereditary torsion theories of R are described in terms of the hereditary torsion
theories of RM for all maximal ideals M of R. By means of an example, it is shown
that h-local is too strong a hypothesis for this localization property. As an
application, all the hereditary torsion theories of h-local Prüfer domains are
described. Some equivalent conditions for a domain to be h-local are generalized to
conditions about hereditary torsion theories.