Justin Lane / EPA
A police officer crosses over police tape at a closed subway station on Tuesday after Sandy drenched New York City.
By James Eng, NBC News
Updated at 4:49 p.m. ET: The unprecedented surge from Sandy?s floodwaters took a bite out of the core of the Big Apple's infrastructure, knocking out power to electrical substations and crippling a subway system used daily?by more than 4 million people.
The storm?s impact should be a wake-up call that the city ? and the rest of the nation ? needs to better prepare for the dangers of the coastal flooding, which is likely to become more frequent in the decades ahead, experts say.
For now, the loss of power and a way to get around adds up to a major headache for many New Yorkers, and a hazard to some.
?The work of getting our mass transit grid and our power grid restored ? is going to take more time and a lot of patience,? New York Mayor Michael Bloomberg said at a Tuesday morning?press conference. ?Our administration will move heaven and earth to help them.?
New York City's Mayor Michael Bloomberg says that at least 10 people were killed during Sandy and the storms' "path of destruction will be felt for some time."
New York?s subway system, one of the largest ? and oldest ? mass-transit systems in the world, was shut down Monday in advance of the superstorm.
Bloomberg said Tuesday it could be ?a good four or five days? before subways are back up and running, though Metropolitan Transit Authority Chairman Joseph Lhota cautioned it's?too early to say how long it will take to restore full service.?
Floodwaters swamped at least seven subway tunnels under the East River, and transit officials called the damage unprecedented.
?The New York City subway system is 108 years old, but it has never faced a disaster as devastating as what we experienced last night,? Lhota said in a statement. ?Hurricane Sandy wreaked havoc on our entire transportation system, in every borough and county of the region. It has brought down trees, ripped out power and inundated tunnels, rail yards and bus depots.?
Reuters
A boat rests on tracks at Metro-North's Ossining Station on the Hudson Line on Tuesday in the aftermath of Hurricane Sandy, in New York.
Bloomberg said the advance shutdown and the MTA?s temporary moving of much of its ?rolling stock? of trains to higher ground may have spared the system from even more serious damage.
But the immediate fix for the flooded system isn?t simply pumping water out of the tunnels.
Unlike rainwater, the corrosive saltwater whipped up by Sandy could damage much of the subways? electrical parts and equipment, says Radley Horton, an associate research scientist with the Center for Climate Systems Research at Columbia University.
Andrew Burton / Getty Images
Superstorm Sandy made landfall Monday evening on a destructive and deadly path across the Northeast.
?Saltwater and electricity don?t mix. Even after that water is removed, it?s going to take some time to replace the electrical equipment, test signals, that sort of thing,? Horton says.
Other potentially serious infrastructure damage wrought by Sandy, according to Horton:
- Electrical generation ? Some major distribution points were reported out. Con Edison said Tuesday that 780,000 homes and business lost power.?The utility?cut electricity to some areas to save its equipment and a transformer exploded at a plant on 14th Street in Manhattan, blacking out others.?Con Ed officials called the power failures ?the largest storm-related outage in our history.?
- Wastewater treatment plants ? New Yorkers rely on these facilities to treat sewage and wastewater from homes and businesses before releasing it into waterways surrounding the city.?Located at sites around the city, many of these plants were overwhelmed during Hurricane Irene last year.
Many of the city?s major roadways and bridges seem to have escaped catastrophic damage. Gov. Andrew Cuomo announced that five of the MTA?s seven bridges were fully inspected and reopened at noon on Tuesday. The two Rockaway bridges, Cross Bay Veterans Memorial and Marine Parkway-Gil Hodges bridges, and the Hugh L. Carey and Queens Midtown Tunnel remain closed. Buses were being phased back into service, with a?full schedule expected for Wednesday.?
Authorities were?still assessing damage to New York's three major airports, and?thousands of flights were canceled across the Northeast.?"We are focused on reopening as quickly as possible. But we will not compromise safety," Pasquale DiFulco, a spokesman for the Port Authority, told Reuters. "We need to walk the runways and make sure there's no debris."
The damage was so severe that Sandy should serve a wake-up call to cities around the world about the extreme threat posed by coastal flooding, scientists say.
Klaus Jacob, a geophysicist and senior research scientist at Columbia University, told PRI?s The World:
?We had one wake-up call last year under the name of Irene. We got away with less than we will most likely incur from Sandy,? says Jacob. ?The question is how many wake-up calls do we need to get out of our snoozing, sleeping, dreaming morning attitude? We have to get into action. We have to set priorities and spend money. For every one dollar invested in protection you get a return of four dollars of not-incurred losses.?
Horton, who was on a blue-ribbon commission that in 2009 examined the MTA and environmental sustainability, said one of the report?s main recommendations was to focus on flexible approaches in adapting to climate hazards.
?In some ways this is the greatest transit system in the world, but I think we?re in uncharted waters,? Horton told NBC News.
Insurance may soften blow of Sandy's economic hit?
?I hope this storm is a wake-up call not just to our region ?. but also nationally to help get adaptation on the map and help people understand the extent to which sea level rise will increase the frequency of coastal flooding events,? Horton said.
?Even if storms do not become stronger in the future and we get a relatively small amount of sea level rise, the frequency of coastal flooding events may triple by end of this century simply because the average sea level will be higher.?
New York Gov. Andrew Cuomo agreed that officials need to think about ways to better protect the nation's most populous city from storms that have been increasing in both intensity and frequency.
?We have to resist the temptation for people to say, 'This is a once-in-a-100-years event; let?s just fix it and move forward,?? Cuomo was quoted as saying.
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