Chapter 6: Evacuation and Sheltering

Vocabulary List

(Evacuation | Ready.Gov, n.d.; Shelter | Ready.Gov, n.d.)

Objectives

This Week's Objectives:

Evacuation

(Evacuation | Ready.Gov, n.d.)

Many kinds of emergencies can cause you to have to evacuate. In some cases, you may have a day or two to prepare while other situations might call for an immediate evacuation. Planning is vital to making sure that you can evacuate quickly and safely no matter what the circumstances.

Evacuation Strategies

(Planning Considerations: Evacuation and Shelter-in-Place, 2019)

Transportation planning considerations should include staging, departure points, transportation centers, and shelter locations. Jurisdictions may choose to employ one of the transportation concepts below to facilitate the movement of evacuees (people needing to leave an area due to a disaster, hazard, or emergency): 

Hub and Spoke (Figure 1) moves and aggregates evacuees in short trips from numerous pickup locations to evacuation centers, which in turn provide evacuation to mass care centers. Hub and spoke maximizes routes and provides immediate movement of people from dangerous locations to a safer location temporarily. This transportation model allows jurisdictions to triage the needs of individuals, which may only be access to temporary shelter or access to personnel to facilitate the rental of a vehicle or other means to evacuate and provide care for themselves and their family directly. 

The Hub and Spoke Evacuation Model. Three houses are on the left, each showing people moving from those houses to one evacuation center, then from the evacuation center the people are moved to three separate buildings or care centers.

Point-to-Point (Figure 2) moves evacuees directly from the point of departure to a host jurisdiction or shelter. Point-to-point is the fastest, most direct and least resource-intensive evacuation action in the immediate operational period. However, it has limited capacity for surges during large displacements. Shelters can come to capacity quickly, increasing travel for evacuees. Additionally, this model is not ideal if the host location has not been determined, such as in the instance of no-notice events that have an unpredictable pattern. 


The Point-to-Point Evacuation Model. Three houses on the side show people going from each to one building, host jurisdiction or shelter.


To ensure safe and efficient evacuation, Emergency Managers must consider the event (for example, emergency or disaster) and then assess the status of the incident that is occurring. Much of the status assessment relates to human safety. Animal safety should also be considered, and many times it will be the responsibility of the individual or family to ensure safe evacuation for their pets. 

As part of status assessment, an Emergency Manager must decide if there is a threat to human safety. This is usually done by using one of three assessments: no threat to human safety, immediate threat to human safety, or potential threat to human safety. If there is no threat to human safety, then as it implies, there is no need to evacuate. If there is an immediate threat to human safety, then an Emergency Manager or Incident Commander would order an immediate evacuation. If there is a potential threat to human safety, then another assessment needs to be made in terms of ordering a post-event evacuation. 

Ordering a post-event evacuation involves two possible decisions: wait and reassess or start evacuation. If the wait and reassess option is chosen, then it leads back to assessing the status of the event or incident in which evaluating human safety again would result. If the start evacuation option is chosen, then the Emergency Manager would need to determine an evacuation approach, such as the Hub and Spoke or Point to Point Evacuation Models, or another suitable evacuation method. Once an evacuation approach is selected, then you would carry out the evacuation. Consider these concepts to help you complete the Decision Tree for Community Evacuation assignment.


Before an Evacuation

During an Evacuation

After an Evacuation

If you evacuated for the storm, check with local officials both where you’re staying and back home before you travel.

Sheltering

(Shelter | Ready.Gov, n.d.)

Sheltering is appropriate when conditions require that you seek protection in your home, where you work, or other location when other emergencies arise. The length of time you are required to take shelter may be short, such as during a tornado warning. Or, the time you are required to take shelter might be longer, such as during a pandemic. In all cases, it is important that you stay informed and follow the instructions of local authorities.

Choosing to take shelter is necessary in many emergencies. This can mean Stay-At- Home, Going to a Mass Care Shelter, or Sheltering in Place. Here’s the distinction:

Mass Care Shelter

Mass care shelters provide life sustaining services to disaster survivors. Even though mass care shelters often provide water, food, medicine, and basic sanitary facilities, you should plan to take your emergency supply kit with you so you will have the supplies you need. Mass care sheltering can involve living with many people in a confined space, which can be difficult and unpleasant. 

Sheltering in Place

Whether you are at home, work, or anywhere else you go to regularly, there may be situations when it's best to stay where you are and avoid any uncertainty outside. 

Here are some indicators and steps to take if the situation arises:

Here are some tips for sheltering in place:

Sealing a room is considered a temporary protective measure to create a barrier between you and potentially contaminated air outside. This type of sheltering in place requires pre-planning, by purchasing plastic sheeting and duct tape that you would keep in your emergency supply kit. 

Stay-at-Home

Determining Water Needs

(Water | Ready.Gov, n.d.)

Store at least one gallon of water per person per day for several days, for drinking and sanitation. A normally active person needs about three quarters of a gallon of fluid daily, from water and other beverages. However, individual needs vary depending on age, health, physical condition, activity, diet, and climate.

Take the following into account:

Water Tips

Never ration drinking water unless ordered to do so by authorities. Drink the amount you need today and try to find more tomorrow. Minimize the amount of water your body needs by reducing activity and staying cool.


First drink water that you know is not contaminated. If necessary, suspicious water, such as cloudy water from regular faucets or water from streams and ponds, can be used after it has been properly treated. If water treatment is not possible, delay drinking suspicious water as long as possible but identify ways to not become dehydrated.


Do not drink carbonated or caffeinated beverages instead of drinking water. Caffeinated drinks and alcohol dehydrate the body which increases the need for drinking water.


If you must prepare your own containers of water, purchase food-grade water storage containers. Before filling with chlorinated water, thoroughly clean the containers with dishwashing soap and sanitize the bottles by cleaning with a solution of one teaspoon of non-scented liquid household chlorine bleach to a quart of water. Water that has not been commercially bottled should be replaced every six months.

Water Treatment

If you have used all of your stored water and there are no other reliable clean water sources, it may become necessary to treat suspicious water. Treat all water of uncertain quality before using it for drinking, food washing or preparation, washing dishes, brushing teeth, or making ice. In addition to having a bad odor and taste, contaminated water can contain microorganisms (germs) that cause diseases such as dysentery, cholera, typhoid, and hepatitis.

There are many ways to treat water. Often the best solution is a combination of methods. Before treating, let any suspended particles settle to the bottom or strain them through coffee filters or layers of clean cloth.

Boiling: This is the safest method of treating water. In a large pot or kettle, bring water to a rolling boil for one full minute, keeping in mind that some water will evaporate. Let the water cool before drinking.

Boiled water will taste better if you put oxygen back into it by pouring the water back and forth between two clean containers. This also will improve the taste of stored water.

Chlorination: You can use household liquid bleach to kill microorganisms. Use only regular household liquid bleach that contains 5.25–6.0 percent sodium hypochlorite. Do not use scented bleaches, color safe bleaches, or bleaches with added cleaners.

Add 1/8 teaspoon of bleach per gallon of water, stir and let stand for 30 minutes. The water should have a slight bleach odor. If it doesn’t, then repeat the dosage and let stand another 15 minutes. If it still does not smell of chlorine, discard it and find another source of water.

Other chemicals, such as iodine or water treatment products sold in camping or surplus stores that do not contain 5.25–6.0 percent sodium hypochlorite as the only active ingredient are not recommended and should not be used.

Distillation: While boiling and chlorination will kill most microbes in water, distillation will remove microbes (germs) that resist these methods, as well as heavy metals, salts, and most other chemicals. Distillation involves boiling water and then collection of only the vapor that condenses. The condensed vapor will not include salt or most other impurities.

To distill, fill a pot halfway with water. Tie a cup to the handle on the pot’s lid so that the cup will hang right-side-up when the lid is upside-down (make sure the cup is not dangling into the water) and boil the water for 20 minutes. The water that drips from the lid into the cup is distilled.

Methods

Kills Microbes (Germs)

Removes other contaminants (heavy metals, salts, and most other chemicals)

Boiling

 Yes

No

Chlorination

 Yes

No

Distillation

 Yes

Yes


Suggested Emergency Food Supplies

(Food | Ready.Gov, n.d.)

After a disaster, there may be power outages that could last for several days. Stock canned foods, dry mixes, and other staples that do not require refrigeration, cooking, water, or special preparation. Be sure to include a manual can opener and eating utensils.

Consider the following things when putting together your emergency food supplies:

We suggest the following items when selecting emergency food supplies. You may already have many of these on hand. 

Food Safety and Sanitation

Without electricity or a cold source food stored in refrigerators and freezers can become unsafe. Bacteria in food grow rapidly at temperatures between 40 and 140 degrees Fahrenheit, and if these foods are consumed, you can become very sick. Thawed food usually can be eaten if it is still refrigerator cold. It can be re-frozen if it still contains ice crystals. Remember, when in doubt, throw it out.


Do:

Do not:


Alternative cooking sources can be used in times of emergency including candle warmers, chafing dishes, fondue pots, or a fireplace. Charcoal grills and camp stoves are for outdoor use only. Commercially canned food may be eaten out of the can without warming.

Managing Food Without Power

Using Dry Ice:

Shelter Assessment

(CDC Shelter Assessment Tool | Emergency Preparedness and Response, 2022)

Disaster shelters provide protection for refuges and safely house individuals and emergency responders. Emergency managers and environmental health practitioners play a key role in protecting the health and living environment of occupants of disaster shelters by conducting pre-occupancy and post-event assessments of these facilities. The assessment is not a substitute for local shelter inspection procedures or planning activities.

A standard assessment form is intended to do the following: 

• Serve as a standardized instrument for rapidly assessing and monitoring environmental health conditions in shelter facilities, before and after a disaster event.

• Cover selected environmental health areas ranging from basic food safety and water quality to pet (companion animal) wellness.

• Assist in identifying and prioritizing environmental health and safety issues in disaster shelters.

• Provide shelter management officials and disaster managers with actionable information and recommendations for improving the living environment of the shelter occupants.

• Capture data and create documentation for use in future planning, disaster training, and improvement of the operations of disaster shelters.

• Complement inspection forms, but not replace.


Evacuation Triage and Prioritization

Using the healthcare setting as one example, triage can be defined as the sorting and categorizing of patients based on clinical severity in order to maximize the results for the most number of patients, especially when there are limited resources available. Triage is a proven method that is used in multiple scenarios in a variety of environments throughout the world. You may be familiar with the process of triage upon initial arrival of patients to a medical facility or upon arrival to the scene when there are multiple casualties. Triage in these situations involves using the START (Simple Triage and Rapid Transport) method or similar tool designed for the environment such as a hospital, residential facility, or an emergency department. Triage, however, does not stop after the first iteration. It must be continually used and reevaluated during any transition of care or when resources or situations change. 

Triage is done in order to prioritize which patients are to be moved first and determine by what means they are transported based on available resources, acuity of the patients (acuity means the priority in which a patient is treated), and treatments or monitoring needed in route of being transported; hence the term evacuation triage.

Just as patients undergo triage when entering a medical treatment area such as an emergency department, triage of patients is necessary before transferring them to other treatment areas or different facilities based on the disaster or emergency occurring. When the needs outstrip resources, triage must be utilized to maximize the results for the number of patients. 

A key difference is to understand that providers are not triaging patients to prioritize treatments. Instead, they are triaging to prioritize evacuation. In our healthcare setting example, it is important to recognize that the patients are already in a treatment area and receiving medical care at this point. The reasons that would necessitate evacuation include being transferred to receive specific care, go to a higher level of care, or to clear space in a treatment area to make room for new patients coming in. And as indicated earlier and as another real world example to consider, the Hub and Spoke transportation model allows jurisdictions to triage the needs of individuals. This type of triage process may only be access to temporary shelter or access to personnel to facilitate the rental of a vehicle or other means to evacuate and provide care for themselves and their family directly. To keep triage evacuation simple, emergency managers can ask this question: How quickly do we need to move a person or family from their current location to the next?

The table below is a tool that emergency managers can use to determine evacuation triage and prioritization. Such a tool using Red—Yellow—Green is a basic way to determine how evacuation should work and who to prioritize based on needs and circumstances. Such a tool can be written by developing appropriate triage criteria (for example, maximum assistance, some assistance, minimal assistance), identifying personnel or organizations to support the effort (for example, security staff, bus drivers, emergency medical technicians, and so on), and what resources would be needed (for example, ambulances, vehicles, and so on). Prioritization can then be as simple as First, Second, Third, Last in terms of when to evacuate or transport. 



Triage Level

Priority for Evacuation from Nursing Unit to Staging Area

Reversed START Priority

Priority for Transfer from the Staging Area to another Health Care Facility

Traditional Start Priority

Red

Last

  • Requires maximum assistance
  • Needs stretchers
  • Requires 2–3 staff members to move

First

  • Requires maximum support to sustain life

Yellow

Second

  • Requires some assistance
  • May need wheelchairs or stretchers
  • May require 1–2 staff members to move

Second

  • Require some support to sustain life



Green

First

  • Requires minimal assistance
  • Ambulatory
  • One staff member can safely lead several to the staging area

Last

  • Requires minimal support to sustain life



(Koser & Suchenski, 2023)

 

Coping with a Disaster

It is natural to feel stress, anxiety, grief, and worry during and after a disaster. Everyone reacts differently, and your own feelings will change over time. Notice and accept how you feel. Taking care of your emotional health during an emergency will help you think clearly and react to the urgent needs to protect yourself and your family. Self-care during an emergency will help your long-term healing. People with preexisting mental health conditions should continue with their treatment plans during an emergency and monitor for any new symptoms.

Take the following steps to cope with a disaster:

Look out for these common signs of distress:

If you experience these feelings or behaviors for several days in a row and are unable to carry out normal responsibilities because of them, seek professional help. 

As everyone responds to emergencies and disasters in different ways, emergency managers should develop the knowledge and skills to better understand how to apply the resources available to assist communities with mental and emotional health needs. Visit Centers for Disease Control: Coping with a Disaster or Tramatic Event to learn more.

(Taking Care of Your Emotional Health, 2019)


References

CDC Shelter Assessment Tool | Emergency Preparedness and Response. (2022, May 25). https://emergency.cdc.gov/shelterassessment/index.asp

Evacuation | Ready.gov. (n.d.). Retrieved September 22, 2023, from https://www.ready.gov/evacuation

Food | Ready.gov. (n.d.). Retrieved September 22, 2023, from https://www.ready.gov/food

Koser, B., & Suchenski, M. (2023). EMS Evacuation Triage. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK537075/

Planning Considerations: Evacuation and Shelter-in-Place. (2019). https://www.fema.gov/sites/default/files/2020-07/planning-considerations-evacuation-and-shelter-in-place.pdf

Shelter | Ready.gov. (n.d.). Retrieved September 22, 2023, from https://www.ready.gov/shelter

Taking Care of Your Emotional Health. (2019). https://emergency.cdc.gov/coping/selfcare.asp

Water | Ready.gov. (n.d.). Retrieved September 22, 2023, from https://www.ready.gov/water


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