NEW YORK — Endurance swimmer Diana Nyad is entering the final hours of her marathon Manhattan swim to benefit victims of Superstorm Sandy.

Nyad started the 48-hour swim Tuesday morning in a 40-yard pool set up in Herald Square. Her aim is to raise money for people still struggling a year after Sandy..

Just before 5 a.m. Thursday, Nyad had been in the pool for more than 44 hours and had raised nearly $84,000.

Last month, the 64-year-old became the first person to have swum from Havana to Key West, Fla., without a shark cage.