The aforementioned announcement is contained in the Memorando Especial Núm. 24-2011 announced to the media by the Oficina de Capacitación y Asesoramiento en Asuntos Laborales y de Administración de Recursos Humanos (OCALARH).
It states that non-essential government workers are to be off work on Tuesday, August 2, 2011 ("El Gobernador de Puerto Rico [...] determinó el cese de labores de los empleados públicos el 2 de agosto de 2011").
In previous years (2010-08-30 and 2009-09-03) these one-off public sector holidays were usually limited to the afternoon.
Links and References
Below are links to the news stories referred to in the above "Puerto Rico Hurricane Public Holiday August 2" news story, as well as links to subsequents news stories which refer to the present news story.