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TROPICAL STORM ISAAC ENROUTE TO A HISTORIC LANDFALL IN LOUSIANA August 21 - 31, 2012 Walter Hays, Global Alliance for Disaster Reduction, University of North Carolina, USA
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AUGUST 21-?, 2012
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WIND PENETRATING BUILDING ENVELOPE SEVERE WINDSTORMS UPLIFT OF ROOF SYSTEM FLYING DEBRIS STORM SURGE IRREGULARITIES IN ELEVATION AND PLAN SITING PROBLEMS FLOODING AND LANDSLIDES CAUSES OF DAMAGE “DISASTER LABORATORIES”
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TROPICAL STORM ISAAC: AUGUST 21, 2012
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TROPICAL STORM ISAAC: AUGUST 23 The storm brought rain and gusty winds to Haiti, Puerto Rico, the eastern Caribbean Islands, and Cuba on Thursday (Aug. 23), leading to 22 deaths.
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ISAAC DUMPS RAIN ON PORT AU PRINCE, HAITI: AUG. 23
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ISAAC’S FORECAST: AUGUST 23, 2012
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ISAAC, MISSED TAMPA BAY, FL, BUT ITS RAIN AND WIND CAUSED A 1-DAY DELAY OF THE 5-DAY REPUBLICAN CONVENTION IN TAMPA, FLORIDA
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EVACUEES LEAVING NEW ORLEANS ON INTERSTATE 10
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EVACUEES IN A LOUISIANA SAFE HAVEN
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ISAAC WAS A RAINMAKER FOR THE GULF COAST
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BAY ST LOUIS, MISS: ISAAC-GENERATED WAVES:
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GULFPORT, MISS: ISAAC- GENERATED WAVES:
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MOBILE BAY, AL: ISAAC- GENERATED WAVES:
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MOBILE BAY, AL: SAND BAGS TO PREVENT FLOODS
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GRAND ISLE Evacuation was ordered for Grand Isle’s 1,300 residents, but 40 refused. Hurricane Isaac’s 166 kph (100 mph) winds caused widespread damage to houses on 12-15 foot stilts. Although the island was covered by as much as 150 cm (5 feet) of water, it was not a problem for the houses on stilts.
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LANDFALL Isaac, a massive and slow-moving CAT 1 hurricane and rainmaker, reached the Louisiana coastline on Tuesday (August 28th) one day short of the seventh anniversary of Hurricane Katrina, which devastated New Orleans in 2005
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ISAAC AT LANDFALL: LATE TUESDAY
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SOCIOECONOMIC IMPACTS New Orleans, south Mississippi, and southeast Louisiana took a beating" from Isaac’s storm surge, heavy rain, and wind field. 725,000 people across five states were without power. 520,00 lost power in Louisiana, possibly for a week
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At landfall, Isaac had winds of 133 kph (80 mph) and rain bands affecting a circular area 330 km (200 miles) wide.
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PLAQUEMINES PARISH: NEW ORLEANS Plaquemines Parish -- a rural area south of New Orleans that experienced flooding in 2005 from Hurricane Katrina -- experienced a 4 m (12-feet) surge from Isaac, causing people to go to their roofs to escape the rising water.
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PLAQUEMINES PARISH: NEW ORLEANS A 9 feet levee in Plaquemines Parish that was not strengthened after Katrina was overtopped, adding to the urgency for search and rescue.
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A RESCUE
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ISAAC WAS, THANKFULLY, NOT AS DEVASTATING FOR NEW ORLEANS AS HURRICANE KATRINA WAS IN 2005 NEW ORLEANS’ IMPROVED LEVEES PERFORMED WELL
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NEW ORLEANS IN 2005: LEVEE FAILURE LEFT 1,000,000 HOMELESS
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NEW ORLEANS IN 2012 When Isaac arrived, New Orleans was a “ghost town” as the result of evacuations, and houses and businesses being boarded up. The fate of New Orleans depended upon the new and improved levees built since 2005.
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NEW ORLEANS: A GHOST TOWN
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NEW ORLEANS: FLOODED
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NEW ORLEANS: POLICE DEPLOYED, BUT NO LOOTING
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NEW ORLEANS: BUSINESSES BOARDED UP
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NEW ORLEANS
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NEW ORLEANS: WIND DAMAGE
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NEW ORLEANS: FLOODING
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ISAAC’S FORECAST AFTER LANDFALL: AUGUST 29, 2012
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MORE RAIN AND FLOODING EXPECTED An additional 25 cm (10 in) of rain, and flooding, is expected as Isaac moves inland and dies.
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