Hurricane Irma, one of the most powerful Atlantic storms in half a century, has triggered hurricane and storm surge warnings for south Florida and the Florida Keys, the U.S. National Hurricane Center said on Thursday.

Irma, which is about 585 miles east-southeast of Miami, Florida, packing maximum sustained winds of 165 miles per hour, will continue to bring life-threatening wind, storm surge, and rainfall hazards to the Turks and Caicos Islands and the Bahamas through Saturday, the NHC said.

Irma should maintain a west-northwestward trajectory but slow down during the next 36 hours, it added.