United States car-safety regulators have expanded a recall of vehicles with potentially dangerous Takata airbags to 7.8 million. The National Highway Traffic Safety Administration warned that owners should “act immediately” on recall notices to replace defective airbags. If deployed with force, the airbags have the potential to eject deadly shrapnel at passengers. The NHTSA has identified 10 manufacturers that used Japan’s Takata Corp. as a a supplier, including GM, Honda, and Toyota. The agency specifically warned those living in more humid climates such as Florida, Mississippi, Hawaii, and areas near the Gulf of Mexico in Texas to get their vehicles inspected. In April 2013, Japanese automakers recalled 3.4 million vehicles equipped with Takata airbags.