I must comment concerning the apparently contradictory finding that the percentage of homeless veterans admitted to psychiatric units was actually higher in hospitals located in warmer climates. Such a finding highlights the importance of other system and patient factors in length of hospital stay. Warmer temperatures "allow" homelessness to exist and thus create a greater pool from which to draw patient admissions. Also, the veterans population may likely be part of this homeless community, as well as participants in an anecdotally recognized phenomenon of seasonal migration of the population that is homeless and mentally ill.