Question

when does a drought occurs​

Answer 1

hey mate here is your answer ..

when there is no sufficient rain drought will occur ..

hope it will help

Answer 2

Droughts happen when there is not enough rain for a long period of time. It's not like a dry spell - there is so little precipitation (rain, snow, sleet or any kind of moisture) that a whole region starts to dry out. Sometimes a drought takes decades to develop fully and they are very difficult to predict.