Tornadoes Module 2 - NIU · Tornadoes Module 2 10 28 NORTHERN ILLINOIS UNIVERSITY – COPYRIGHT...

Tornadoes Module 2

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1NORTHERN ILLINOIS UNIVERSITY NORTHERN ILLINOIS UNIVERSITY –– COPYRIGHT 2007COPYRIGHT 2007



Issued by the National Weather Service when tornadoes are possible in an areaRemain alert for approaching stormsRemind family/employees of location of safest placesListen to the radio or television for further developments

- Tornado Watch -Issued by the National Weather Service when tornadoes are possible in an areaRemain alert for approaching stormsRemind family/employees of location of safest placesListen to the radio or television for further developments

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Issued when a tornado has been sighted or indicated by weather radar Seek shelter immediately

- Tornado Warning -Issued when a tornado has been sighted or indicated by weather radar Seek shelter immediately


Develop an Emergency Communication PlanHave disaster supplies on hand

First aid kit Flash light and batteries Bottled water Blankets

Designate a safe placeConduct drills

- Before Tornado Season -Develop an Emergency Communication PlanHave disaster supplies on hand

First aid kit Flash light and batteries Bottled water Blankets

Designate a safe placeConduct drills


Evaluate tornado plans and shelters in facilities serving the public yearlyProvide directions to designated safe placesProvide NOAA weather radio coverage continuously in publicHave a tornado plan about where to shelter people

Evaluate tornado plans and shelters in facilities serving the public yearlyProvide directions to designated safe placesProvide NOAA weather radio coverage continuously in publicHave a tornado plan about where to shelter people

- Shelters and Warnings -

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Keep an up-to-date list of shelter addresses to assist fire departments and emergency service agencies

- Shelters and Warnings -(continued)


Plans and shelters need to accommodate individuals with special needs

Public buildings must be wheelchair accessible Refuge plans need to include information in Braille

- American With Disabilities Act -


Do not open windows Does not reduce the risk of damage

Seek shelter in the center of the basement or a secure room

Folk tale about southwest corner is false

Do not open windows Does not reduce the risk of damage

Seek shelter in the center of the basement or a secure room

Folk tale about southwest corner is false

- During a Tornado Warning -

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Overturn easily because not anchoredGood indicators of tornadoes not spottedPersons in mobile homes should:

Seek buildings with strong foundations Lie in ditch or low lying area

Overturn easily because not anchoredGood indicators of tornadoes not spottedPersons in mobile homes should:

Seek buildings with strong foundations Lie in ditch or low lying area

- Mobile Homes -


If the tornado is close Get out of your car and lie in a ditch or low- lying area

If the tornado is a safe distance away Assess if it is coming directly toward you (will appear

to be standing still as it gets larger) Escape by driving at right angles to its path

If the tornado is close Get out of your car and lie in a ditch or low- lying area

If the tornado is a safe distance away Assess if it is coming directly toward you (will appear

to be standing still as it gets larger) Escape by driving at right angles to its path

- Driving -


- You are too close! -

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Use threaded fasteners to attach metal roof decking

Welds often insufficient Avoid aggregate and paver roof surfacesUse enhanced wind design for roof coverings on essential buildings

- Property Protection -

Use threaded fasteners to attach metal roof decking

Welds often insufficient Avoid aggregate and paver roof surfacesUse enhanced wind design for roof coverings on essential buildings


Reinforce concrete and partially reinforced masonry with adequate tiesMake ties between concrete and other materials with drilled-in fasteners or cast-in-place fasteners


Reinforce concrete and partially reinforced masonry with adequate tiesMake ties between concrete and other materials with drilled-in fasteners or cast-in-place fasteners

(continued)


Construct masonry walls to support building’s architecture

Exterior wall panels Parapets Balconies Decorative finishes

Maintain diaphragm action to resist wind-generated shear forcesProperly place reinforcements in concrete and masonry walls


Construct masonry walls to support building’s architecture

Exterior wall panels Parapets Balconies Decorative finishes

Maintain diaphragm action to resist wind-generated shear forcesProperly place reinforcements in concrete and masonry walls

(continued)

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Use anchors in precast concrete buildingsAvoid using powder-driven anchors Use quality architectural features

Minimizes windborne debrisBolt swing sets/tables to the ground


Use anchors in precast concrete buildingsAvoid using powder-driven anchors Use quality architectural features

Minimizes windborne debrisBolt swing sets/tables to the ground

(continued)


Adopt ordinances and regulations that promote disaster resistanceIncorporate tornado shelters into new construction and communities

- Communities -

Adopt ordinances and regulations that promote disaster resistanceIncorporate tornado shelters into new construction and communities


Invest in proper construction techniques and current model building codes

Reduces damage from low to moderate intensity tornadoes

In addition to building damages, businesses may suffer other losses

Loss of inventory Business interruption Loss of wages for employees

Businesses often do not recover

Invest in proper construction techniques and current model building codes

Reduces damage from low to moderate intensity tornadoes

In addition to building damages, businesses may suffer other losses

Loss of inventory Business interruption Loss of wages for employees

Businesses often do not recover

- Protecting Businesses -

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Start to think about preparednessPrepare to seek shelterHave emergency kit nearby

Working flashlights Spare batteries

Turn off all unnecessary powerPlan for utility shut downMonitor for weather updatesHave battery-powered radio

- Response to Tornado Watch -

Start to think about preparednessPrepare to seek shelterHave emergency kit nearby

Working flashlights Spare batteries

Turn off all unnecessary powerPlan for utility shut downMonitor for weather updatesHave battery-powered radio


Go to a designated shelter area Stop work Shut off equipment and utilities Walk rapidly to designated areas Avoid confusion and horseplay Follow instructions

In shelter Crouch down Cover your head Wait for “all clear” Be patient and calm

- Response to Tornado Warning -

Go to a designated shelter area Stop work Shut off equipment and utilities Walk rapidly to designated areas Avoid confusion and horseplay Follow instructions

In shelter Crouch down Cover your head Wait for “all clear” Be patient and calm

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Implement planCancel outdoor eventsDirect everyone to a shelter areaDesignate marshals to show the way

- Public Events -

Implement planCancel outdoor eventsDirect everyone to a shelter areaDesignate marshals to show the way


Immediate danger Move to a safer area If odor, do not use cell phones or other electrical equipment If no odor, call 911 or wait for emergency response

No immediate danger Stay where you are Call 911 Follow instructions

- Response to Building Damage -

Immediate danger Move to a safer area If odor, do not use cell phones or other electrical equipment If no odor, call 911 or wait for emergency response

No immediate danger Stay where you are Call 911 Follow instructions


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Continue listening for updated informationUse the telephone only for emergency callsHelp those who may require special assistanceHelp injured or trapped persons

- Tornado Recovery -

Continue listening for updated informationUse the telephone only for emergency callsHelp those who may require special assistanceHelp injured or trapped persons


Watch out for fallen power lines or broken gas lines Avoid disaster areasStay out of damaged buildings

- Tornado Recovery -

Watch out for fallen power lines or broken gas lines Avoid disaster areasStay out of damaged buildings

(continued)


Use extreme caution Wear sturdy shoesUse battery-powered flashlightsWatch for potential structural collapseWatch for loose plaster, drywall and ceilings

- Recovery: Damaged Buildings -

Use extreme caution Wear sturdy shoesUse battery-powered flashlightsWatch for potential structural collapseWatch for loose plaster, drywall and ceilings

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Fire hazards Identify damaged gas lines and

electrical systems Clean up spilled chemicals Be aware of gas leaks

Electrical system damage Turn off electricity at main fuse

box if danger apparent (sparks, frayed wires, burning insulation…)

Take pictures of all damage for insurance claims

- Recovery: Hazards -

Fire hazards Identify damaged gas lines and

electrical systems Clean up spilled chemicals Be aware of gas leaks

Electrical system damage Turn off electricity at main fuse

box if danger apparent (sparks, frayed wires, burning insulation…)

Take pictures of all damage for insurance claims


Use extreme caution when turning on main switch gear and electrical cabinetsOnly authorized people should activate electrical mainsInspect hazardous materialsClean up chemical spillsTake pictures

- Recovery: Industrial Buildings -

Use extreme caution when turning on main switch gear and electrical cabinetsOnly authorized people should activate electrical mainsInspect hazardous materialsClean up chemical spillsTake pictures


Use extreme cautionConsider big picture before actingLook for hazardsTake time to planWork in pairsFollow incident commander’s directions

- Recovery: First Responders -

Use extreme cautionConsider big picture before actingLook for hazardsTake time to planWork in pairsFollow incident commander’s directions

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Tornadoes Module 2 - NIU · Tornadoes Module 2 10 28 NORTHERN ILLINOIS UNIVERSITY – COPYRIGHT...

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