President-elect Trump's plans for mass deportations could hinder Los Angeles' rebuilding efforts.Eugene Garcia/ AP PhotoTrump's mass deportation plans could hinder LA wildfire rebuilding efforts.Immigrants form a large part of California's construction workforce, already facing shortages.Deportations could worsen housing shortages and increase costs in the construction industry.Housing policy and immigration researchers say President-elect Donald Trump's plans for mass deportations could hamper efforts to rebuild the thousands of homes destroyed by the wildfires in Los Angeles and intensify the region's housing shortage.Data from the National Association of Home Builders shows immigrants, including those living in the US illegally, make up a significant portion of California's construction workforce, which is already suffering from a shortage of workers.The extent and scope of possible deportations after Trump takes office on January 20 is still unclear.