One of Haley's longtime neighbors also described her as upbeat and said she always looked forward to dinner dates with family and friends.
They were found by a neighbour on Saturday morning and taken to hospital, where they were pronounced dead.
They said Williams was headed to her auto to leave when she fell down near the near of the vehicle.
The neighbor hound Williams face down in the driveway of her sister's home and Haley was found in the garage.
Temperatures were freezing with a wind chill overnight Friday into Saturday, when much of New England saw some if its coldest temperatures of the winter. She said it would have been incredibly hard for either sister to live without the other. The Providence Journal reported that Haley lived at 21 Opechee Drive, Barrington, and Williams lived in East Providence.
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The fears stem from recently intercepted radio messages sent out in the dead of night by the Pyongyang propaganda station. The kind of missile is uncertain but the North is prohibited from nuclear tests or any missile by the UN.
Police believe Williams may have fallen while trying to get to her vehicle and that Haley might have tripped on a rug and fell in the garage while attempting to get help.
According to police, the women spent hours outside in the cold before succumbing to hypothermia.
Police said they don't believe any foul play was involved. Jean Haley managed to reach the garage, while Martha Williams remained behind to lock the auto.
The exact cause of the deaths of the 97-year-old twin sisters has not yet been officially determined.
Police Chief John LaCross called the twins deaths a 'tragic loss'.