Emergency..

• a sudden unforeseen crisis (usually involving danger) that requires immediate action
• An emergency is a situation which poses an immediate risk to health, life, property or environment. Most emergencies require urgent intervention to prevent a worsening of the situation, although in some situations, mitigation may not be possible and agencies may only be able to offer palliative ..

Disaster..

• A disaster takes place when the following three conditions occur at the same time :

          1. When people live in hazardous places like, for example, close to an active volcano, on unstable slopes  

              where landslides are likely to happen, or close to rivers which could flood.

          2. When a hazardous phenomenon occurs, be it natural or human-made.

          3. When the phenomenon also causes a lot of damage, especially where no preventive measures have 

              been taken