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drought is a situation when there is no water to drink or any other uses
its effect, causes
1 river water , underground water gets dried up
2 crops fail because of no water
3 there will be shortage of food 
4 farmers will have to incur a huge loss
5 fishes die
6 animals will die because of thirst etc
1 5 1
Long period of rainless weather condition is called drought.the severity of drought depends upon the degree of moisture deficiency,the duration and the size and location of the affected area.
techniques of conservation of water like sprinkle irigation that can withstand drought are some of the remedies that may reduce the impact of drought when it is possible to predict drought.

i hope it helps...