Fill in the blanks:
1. An unplanned event is called as an ___________.
2. Unexpected fire, accidents may take place owing to power _______.
3. ________ refer to a dangerous situation, such as an accident.
4. The accidents may lead to emergencies and needs immediate _______ of the retailer.
5. He expected to take ___________ steps in emergency conditions.
6. Emergency situations are ___________.