Fierce Hurricane Ike targets Gulf

Fierce Hurricane Ike weakened as it charged across the Atlantic yesterday and took aim at south Florida and the oil fields of the Gulf of Mexico, while Tropical Storm Hanna was set to crash ashore in the Carolinas after killing at least 136 people in Haiti.

Hanna was expected to be just short of minimal Category 1 hurricane strength when it reaches the US East Coast near the North Carolina and South Carolina border early on Saturday, the US National Hurricane Centre said.

Nevertheless, authorities declared states of emergency, coastal campgrounds were shut and storm alerts were issued from Georgia to New Jersey, including for Washington, DC, as the eighth tropical storm of the Atlantic hurricane season pulled away from the 700 far-flung islands of the Bahamas. Ike was far more threatening.

An extremely dangerous Category 4 hurricane on the five-step Saffir Simpson scale on Thursday, it weakened a notch to a Category 3 with top sustained winds of 120 mph (195 km per hour), the Miami-based hurricane centre said.

By 11 a.m. EDT (1500 GMT) it was spinning about 685 kilometres north of the Leeward Islands of the Caribbean, still days away from reaching any land. Some further weakening was possible but the hurricane centre said Ike was expected to remain a "major" storm of Category 3 or higher. Ike's track was riddled with uncertainty.

The hurricane centre's latest official forecast took it through the Florida Keys island chain as a ferociously destructive Category 4 hurricane into the Gulf of Mexico, where around 4,000 offshore platforms produce a quarter of US crude oil and 15 per cent of the energy-hungry country's natural gas.

Some computer models took Ike near the heavily populated Miami area in southeast Florida, where up to 1.3 million people could be ordered to evacuate.

"It's a lot coming at us. But we must remain vigilant, focused and calm," Florida Gov. Charlie Crist said.

A Category 4 hurricane strike on Miami would be a huge disaster because of the billions of dollars of vulnerable real estate in low-lying islands like Miami Beach and along the coast of the Florida peninsula. Power would be out for millions of people for an extended time.

Tropical Storm Josephine churned weakly in Ike's wake across the Atlantic, boasting 75-kph winds and located around 1,120 kilometres west of the Cape Verde Islands.

The trio of Atlantic storms followed Hurricane Gustav's rampage through the Caribbean to Louisiana, where it came ashore on Monday west of New Orleans, largely sparing the city devastated by Hurricane Katrina three years ago.