(110 words) U.S. and Caribbean brace for powerful storm Hurricane Irma, a powerful Category 4 storm, is ploughing towards the Caribbean and Florida as islands in its path brace for possible life-threatening winds, storm surges and flooding Potential track area All times EST (GMT-4) 20:00 Sep 6 20:00 Sep 7 20:00 Sep 8 20:00 Sep 9 08:00 Sep 6 20:00 Sep 5 State of emergency declared in Florida and Puerto Rico JAMAICA MEXICO COLOMBIA VENEZUELA UNITED STATES ATLANTIC OCEAN PACIFIC OCEAN CUBA HAITI PUERTO RICO (U.S.) DOMINICAN REP. FLORIDA Leeward Islands Caribbean Sea 250 miles 400km Sources: U.S. National Hurricane Center