Nine days after Hurricane Ida slammed the Gulf of Mexico, about four-fifths of the region's offshore production remains shut, making the storm one of the most costly weather events since back-to-back storms in 2005 cut output for months. #News #Reuters #HurricanIda #oilproduction Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en