Drought has many causes. It can be caused by not receiving rain or
snow over a period of time. We learned in the discussions about the water cycle
and weather that changes in the wind patterns that move clouds and
moisture through the atmosphere can cause a place to not receive its
normal amount of rain or snow over a long period of time.
If you live in a place where most of the water you use comes from a
river, a drought in your area can be caused by places upstream from you
not receiving enough moisture. There would be less water in the river
for you and other people who live along the river to use.
People can also play a big role in drought. If we use too much water
during times of normal rainfall, we might not have enough water when a
drought happens. These can be the situations that lead to droughts.