Currently in present time the problem of droughts is causing less food grown.
Droughts can cause less crops to be grown by farmers since there is no water provided to them for themselves and crops.
Without crops and water for farmers it can also effect the animals in the since they won't be provided with food and water. This can lead to no production from animals in the farm.
Another effect of this is that since there is less crops getting water then the certain crops can become more rare. This can lead to higher cost in the supermarket since there is a higher demand for these foods.
Since there is less crops being grown it can also effect the farmer's buisness since the farmer isn't selling as many crops.