- ADVERTISEMENT - Federal authorities are considering using the Long Beach Convention Center as a facility to provide temporary shelter for the overwhelming number of migrants, many of them children, arriving in the United States from Mexico, sources told the Post. Convention centers in San Diego and Dallas have already been converted to shelters to help house the thousands of migrants packing facilities at the U.S.-Mexico border in recent weeks. If the plan goes forward, the children in Long Beach could be housed in the Convention Center’s 45,000-square-foot Arena until being transported to safe housing elsewhere in the U.S., according to sources, who weren’t authorized to speak on the record.