Nation Fiona threatens to become Category 4 storm; ‘Big part’ of Puerto Rico will have power soon, officials say September 20, 2022September 21, 2022 John Bacon, USA TODAY Comments Off on Fiona threatens to become Category 4 storm; ‘Big part’ of Puerto Rico will have power soon, officials say Fiona became a Category 3 storm overnight, knocking out power to 80% of Puerto Rico. In the Dominican Republic, 1 million are without running water.