there are many problems faced while floods they are :

1. people don't have proper shelter for their survival

2.when there is a flood the snakes come out from their holes and they cause harm to people

3.people don't get proper food.

4. there would be power cuts and they cannot do any of the work.

5.if they entire into the flood water it may drown them in to it and cause some kind of allergies.

hope so my answer is useful  
Several problems are faced during flood. some of them are listed below :
*peoples have to leave their shelter.
 *due to flood a large scarcity of food is seen at the disaster sight.
 *famine and water born diseases are common in such area.
 *A large amount of harm to the property is made due to flood.
 *peoples have to loose their lives in flood.