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June 15, 2008 1
HURRICANE EVACUATION PLANNING
All of the following slides are from a presentation by emergency preparedness and planning agencies for
Harris and Galveston Counties. I posted them on this website to make it easier for NE Harris County ARES Members to find them and for use during the June 15,
2008 Sunday evening TEAC and ARES Net.
Chuck SprickKE5RAD
Emergency CoordinatorNE Unit, District 14, ARES
June 15, 2008 2
EVACUATION ROUTES AND DESTINATIONS
June 15, 2008 3
DPS
TEXAS OEM
REGIONAL
LIASON
OFFICERS
NATIONAL
GUARD
DEPT. OF
TRANSPORTATIONPARKS AND
WILDLIFE
COUNTY
OEM
SHERIFF’S
DEPT.
FLOOD
CONTROL
CITY
OEM
FIRE
DISTRICTS
ROADS AND
BRIDGES
POLICE
FIRE
PUBLIC
WORKS
TEXAS FOREST
SERVICE
June 15, 2008 4
RECENT PLANNING EFFORTS
Planning for Hurricane Evacuation from the Harris/Galveston County Coastal Areas on the Texas Gulf Coast has been ongoing for years. Since the evacuation of that area associated with Hurricane Rita, this planning has received far more attention on a much larger scale. State, Local, Non‐ profit and Private Agencies are all taking a much more serious role in developing evacuation strategies and planning. Inland areas with no tradition of planning cooperation with Coastal areas have joined in the effort as a result of lessons learned from receiving large numbers of Hurricane Katrina and Rita Evacuees.
June 15, 2008 5
WHEN AND HOW SHOULD THEY EVACUATE
THOSE IN SURGE ZONES SHOULD EVACUATE NO LATER THAN
ADVISED TO DO SO BY THEIR LOCAL OEM USING ROUTES
ASSIGNED TO THEM BY LOCAL OEMTHOSE OUTSIDE SURGE AREAS WISHING TO LEAVE FOR HEALTH
OR OTHER PHYSICAL REASONS SHOULD PLAN TO LEAVE 3 TO 4
DAYS PRIOR TO LANDFALL TO PRE PLANNED AREAS AS FAR
FROM COASTAL AREAS AS POSSIBLE.
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PLAN TO STAY EVACUATED FOR A MINUMUM OF 2 WEEKS. LONGER EVACUATION TIMES ARE POSSIBLE AND CONTINGENCIES FOR THAT
EVENTUALITY SHOULD BE MADE.
June 15, 2008 8
2008 EVACUATION ROUTES
TEXAS DEPARTMENT OF TRANSPORTATION HAS DEVELOPED THE FOLLOWING EVACUATION ROUTES FROM THE HOUSTON/GALVESTON AREA. THE LAST ROUTE PLANNED FOR USE IS HWY 59 WHICH MOVES THROUGH OUR AREA.
SPONTANEOUS EVACUATION ON HWY 59 IS, HOWEVER, LIKELY.
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EVACUATION PLANNING FACTSThere are an estimated 1,250,000 persons living in the surge areas in Harris and Galveston Counties. These people are in grave peril from storm surge associated with a category 4 or larger hurricane. Evacuation for these people is not a choice, they must leave. Evacuation Routes from these areas normally utilize 7 lanes for outbound traffic or can contra‐flow 14 lanes. A maximum 2000 vehicles per hour can move per lane under normal conditions at freeway speeds. No reasonably accurate models exist for vehicles per hour when contra‐flow takes place. It is widely accepted that less than ½ this number would be possible. If we were in a perfect world and every vehicle held 4 people, 56,000 persons an hour would mean that the surge zones would be clear in 22.3 hours. All evacuees would be out of Montgomery County on Hwy 59 in about 26 hrs. and to their evacuation hubs in 30 hours. This time frame would work well with typical real world weather forecasting and reaction. It does not, however, consider any efficiency loss due to vehicle accidents, breakdowns, traveler illness or other unplanned events. Risk of large numbers of evacuees being unable to pass through areas borderingsurge zones is significant.
June 15, 2008 15
HWY 59 AT WILL CLAYTON ONE DAY PRIOR TO HURRICANE RITA STRIKING THE UPPER
TEXAS AND LOUISIANA COAST
June 15, 2008 16
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