WRAPUP 4-Scary Hurricane Ike targets Gulf, Hanna nears U.S.

* Hanna strengthens as it nears shore

* Florida prepares for Ike

* Josephine a weak storm

By Gene Cherry

SALVO, N.C., Sept 5 (Reuters) - Fierce Hurricane Ike weakened as it charged across the Atlantic on Friday 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 Category 1 hurricane strength when it reaches the U.S. East Coast near the North Carolina and South Carolina border early on Saturday, the U.S. National Hurricane Center said.

Nevertheless, authorities declared states of emergency, several North Carolina beach communities were under evacuation orders, campgrounds were shut and storm alerts were issued from Georgia to New Jersey, including for Washington, D.C., 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 115 mph (185 km per hour), the Miami-based hurricane center said.