Experiencing an emergency in a spiritual sense is having to deal with the unexpected, which may test our perceived limitations. Any emergency puts our emotions under stress and so it is in dreams. If we are under stress in waking life we may dream of an emergency and equally if there is an emergency in real life we may dream of explosions and other such images. What seems like an emergency to one person may not be so to another. Anxiety dreams often contain some element of the necessity for immediate action.
You might also like to consult Accident and Explode/Explosion.