In developing and least developed nations, acute food shortages are frequently brought on by drought. The brain and nervous system sustain the least amount of organ damage during prolonged fasting.
"A period of exceptionally dry weather sufficiently extended for the lack of water to cause substantial hydrologic imbalance in the afflicted area" is the definition of a drought. -Meteorology Glossary (1959).
Low precipitation over a long period of time causes droughts. Drought is caused by a variety of atmospheric causes, including climate change, ocean temperature changes, jet stream changes, and local topography changes.
Droughts can be avoided in part by being aware of how much water you consume each day. Using a water-saving technique like turning off the faucet while you wash your teeth or watering your lawn in the morning to reduce evaporation.
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