HAVANA (AP) — Hurricane Ike moved into the warm waters of the Gulf and took aim at the U.S. and Mexican coasts Tuesday after bringing down aging buildings in Havana and tearing through western Cuba’s tobacco country. Forecasters said Ike, which has already killed at least 80 people in the Caribbean, could strengthen into a massive Category 3 storm before slamming into Texas or Mexico this weekend. Some 1.2 million people — more than a tenth of Cuba’s population — sought refuge from Ike.