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Response

The response phase of an emergency may commence with Search and Rescue but in all cases the focus will quickly turn to fulfilling the basic humanitarian needs of the affected population. This assistance may be provided by national or international agencies and organizations. Effective coordination of disaster assistance is often crucial, particularly when many organizations respond and local emergency management agency (LEMA) capacity has been exceeded by the demand or diminished by the disaster itself. The National Response Framework is a United States government publication that explains responsibilities and expectations of government officials at the local, state, federal, and tribal levels. It provides guidance on Emergency Support Functions that may be integrated in whole or parts to aid in the response and recovery process.

The response phase is when preparedness work is adapted to the situation that appeared. While disaster planning is critically important, the plans rarely match the situation exactly, so the plans need to be adapted. For example, although many airlines have disaster plans, most of those plans also assume that a disaster will happen at an airport they frequently use. If they need to deal with airplane crash in the mountains or the ocean, then the plan is adapted.

On a personal level the response can take the shape either of a shelter-in-place or an evacuation.

In a shelter-in-place scenario, a family would be prepared to fend for themselves in their home for many days without any form of outside support. In an evacuation, a family leaves the area by automobile or other mode of transportation, taking with them the maximum amount of supplies they can carry, possibly including a tent for shelter. If mechanical transportation is not available, evacuation on foot would ideally include carrying at least three days of supplies and rain-tight bedding, a tarpaulin and a bedroll of blankets.

Organized response includes evacuation measures, search and rescue missions, provision of other emergency services, provision of basic needs, and recovery or ad hoc substitution of critical infrastructure. A range of technologies are used for these purposes.

Donations are often sought during this period, especially for large disasters that overwhelm local capacity. Due to efficiencies of scale, money is often the most cost-effective donation if fraud is avoided. Money is also the most flexible, and if goods are sourced locally then transportation is minimized and the local economy is boosted. Some donors prefer to send gifts in kind, however these items can end up creating issues, rather than helping. One innovation by Occupy Sandy volunteers is to use a donation registry, where families and businesses impacted by the disaster can make specific requests, which remote donors can purchase directly via a web site.

Medical considerations will vary greatly based on the type of disaster and secondary effects. Survivors may sustain a multitude of injuries to include lacerations, burns, near drowning, or crush syndrome.

Amanda Ripley points out that among the general public in fires and large-scale disasters, there is a remarkable lack of panic and sometimes dangerous denial of, lack of reaction to, or rationalization of warning signs that should be obvious. She says that this is often attributed to local or national character, but appears to be universal, and is typically followed by consultations with nearby people when the signals finally get enough attention. Disaster survivors advocate training everyone to recognize warning signs and practice responding.