Updated from 4:52 p.m. EDT with information about reopening of major U.S. stock exchangesNEW YORK ( TheStreet) -- As cleanup crews took to the streets of Manhattan to sweep away fallen limbs and debris, swaths of East Coast residents emerged from shelter on Tuesday to assess the massive flooding, fires and structural damage Hurricane Sandy wreaked across the region. President Barack Obama declared a major disaster in New York and Long Island, which bore the brunt of the sea surge from the superstorm that hit the East Coast on Monday. The president also declared a major disaster exists in New Jersey, West Virginia and Virginia. The U.S. death toll rose to 39 following Sandy's destruction across the East Coast, according to the Associated Press. More than 8.2 million people were without power across the region. Airlines have cancelled more than 15,000 flight around the world, according to the AP. In sum, Sandy was expected to have caused about $20 billion in property damages and another $10 billion to $30 billion more in lost business, according to data given to the AP by forecasting firm IHS Global Insight. The National Hurricane Center said Tuesday morning the storm was moving westward across Pennsylvania and was centered about 90 miles west of Philadelphia. The storm lost its hurricane status on Monday and is now considered an extratropical cyclone. The storm is expected to move into western New York on Tuesday night and move into Canada on Wednesday. Obama spoke Tuesday at the Red Cross in Washington D.C. and warned Americans that the storm was not yet finished. "America is with you. We are standing behind you, and we are going to do everything we can to help you get back on your feet," Obama said. Lower Manhattan, where the New York Stock Exchange floor is located, was largely without power Tuesday morning after energy company Con Edison ( ED), shut off most of the electricity in the area to protect electrical equipment from the massive storm surge caused by Sandy. Despite widespread flooding in lower Manhattan, the New York Stock Exchange "building and trading floor are fully operational," the NYSE said in a statement. The Nasdaq released a similar press briefing. The photographs below document the deadly havoc caused by Hurricane Sandy. The introduction to this article was written by a member of TheStreet staff. The captions below the images were written by the photographers and their respective photo agencies. We believe these captions to have been accurate at the time of their writing.