tropical storm isaac enroute to a historic landfall in lousiana august 21 - 31, 2012 walter hays,...
TRANSCRIPT
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
AUGUST 21-?, 2012
WIND PENETRATING BUILDING ENVELOPE
SEVERE WINDSTORMS
SEVERE WINDSTORMS
UPLIFT OF ROOF SYSTEM
FLYING DEBRIS
STORM SURGE
IRREGULARITIES IN ELEVATION AND PLAN
SITING PROBLEMS
FLOODING AND LANDSLIDES
CAUSES OF DAMAGE
CAUSES OF DAMAGE
“DISASTER LABORATORIES”
“DISASTER LABORATORIES”
TROPICAL STORM ISAAC: AUGUST 21, 2012
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.
ISAAC DUMPS RAIN ON PORT AU PRINCE, HAITI: AUG. 23
ISAAC’S FORECAST: AUGUST 23, 2012
ISAAC’S FORECAST: AUGUST 23, 2012
ISAAC, MISSED TAMPA BAY, FL, BUT ITS RAIN AND WIND CAUSED A 1-DAY DELAY OF
THE 5-DAY REPUBLICAN CONVENTION IN TAMPA,
FLORIDA
EVACUEES LEAVING NEW ORLEANS ON INTERSTATE 10
EVACUEES IN A LOUISIANA SAFE HAVEN
ISAAC WAS A RAINMAKER FOR THE GULF COAST
BAY ST LOUIS, MISS: ISAAC-GENERATED WAVES:
GULFPORT, MISS: ISAAC-GENERATED WAVES:
MOBILE BAY, AL: ISAAC-GENERATED WAVES:
MOBILE BAY, AL: SAND BAGS TO PREVENT FLOODS
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.
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
ISAAC AT LANDFALL: LATE TUESDAY
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
At landfall, Isaac had winds of 133 kph (80 mph) and rain
bands affecting a circular area 330 km (200 miles) wide.
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.
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.
A RESCUE
ISAAC WAS, THANKFULLY,NOT AS DEVASTATING FOR NEW
ORLEANS AS HURRICANE KATRINA WAS IN 2005
NEW ORLEANS’ IMPROVED LEVEES PERFORMED WELL
NEW ORLEANS IN 2005: LEVEE FAILURE LEFT 1,000,000 HOMELESS
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.
NEW ORLEANS: A GHOST TOWN
NEW ORLEANS: FLOODED
NEW ORLEANS: POLICE DEPLOYED, BUT NO LOOTING
NEW ORLEANS: BUSINESSES BOARDED UP
NEW ORLEANS
NEW ORLEANS: WIND DAMAGE
NEW ORLEANS: WIND DAMAGE
NEW ORLEANS: FLOODING
NEW ORLEANS: FLOODING
ISAAC’S FORECAST AFTER LANDFALL: AUGUST 29, 2012
MORE RAIN AND FLOODING EXPECTED
An additional 25 cm (10 in) of rain ,
and flooding, is expected as Isaac moves inland and
dies.