An eruv (string around a boundary) allows Jews to carry on the Sabbath without violating Jewish law.
YICC.com emails: Dear Members, The LA Eruv committee reports that they have lost several hundred yards of eruv boundary to construction along the 405, and they do not have the appropriate permission to replace it in a workable fashion. They are working on a solution, but will be hard pressed to have the problem fixed before Shabbat. Additionally, please note the Eruv may be down for next Shabbos as well. If the Eruv is down for Shabbat, one may not carry anything on Shabbat – including keys and pushing strollers. Please make alternate arrangements.