Huge plumes of smoke can be seen rising from the burning building About 70 firefighters and 12 appliances are at the scene of a major blaze at a printing factory in West Calder.
Emergency services were called to Amcor Flexibles at Brucefield Industrial Estate just before 1200 BST.
One person was taken to St Johns hospital in Livingston where they are being treated for burns to the arm.
Local residents were being warned to stay indoors and keep their doors and windows closed because of fears over possible toxic fumes from chemicals.
This article is from the BBC News website. © British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.