More than 90 deaths in the US have now been blamed on Sandy, the huge storm that has left residents on the east coast struggling to recover.
Worst hit were New York City and New Jersey, with fuel shortages the latest in a series of post-storm challenges.
 
Campaigning for Tuesday's presidential election - suspended earlier in the week - has fully resumed.
 
New York Mayor Michael Bloomberg endorsed President Barack Obama, citing his leadership on climate change.
 
He said Sandy could be evidence of climate change.
 
Of the two candidates, Mr Bloomberg said, "one sees climate change as an urgent problem that threatens our planet; one does not".
 
"I want our president to place scientific evidence and risk management above electoral politics."
 



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