NEW ORLEANS (WGNO) — Both directions of the Causeway Bridge are closed due to a multi-vehicle crash. According to the St. Tammany Parish Sheriff's Office, dozens of vehicles collided on the southbound span of the bridge. Precautionary boil water advisory in place for Lower 9th Ward Deputies are encouraging the public to expect significant traffic delays and to use an alternate route to reach their destination until at least 12 p.m. (Courtesy: Dori Orr)(Courtesy: Dori Orr)(Courtesy: Dori Orr)(Courtesy: Dori Orr)(Courtesy: Dori Orr)(Courtesy: Dori Orr) WGNO reached out to Carlton Dufrechou with The Greater New Orleans Expressway Commission who stated the dense fog played a part in the initial crash. Fatal hit-and-run on Pontchartrain Expressway under investigation "Dense fog rolled in unexpectedly causing several crashes on both bridges. My responding officers were rear-ended, and we are just now trying to assess the damage, we know there are injured folks but we don't know the extent of their injuries and we don't know how many people were injured. We are now trying to get people off the bridge safely," said Dufrechou. This is a developing story. Stay with WGNO as more information becomes available. Latest Posts Multi-vehicle crash shuts down both directions of Causeway Bridge FTC bans junk ticket, hotel fees Connolly defeats Ocasio-Cortez to lead Democrats on Oversight panel House Republicans fume at Speaker Johnson over handling of CR: ‘A total dumpster fire’ What we know about the 2 killed, 6 injured in Wisconsin Christian school shooting