What Are Flash Droughts?

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Flash droughts are harmful to crops, streams and wells, and researchers are finding them difficult to predict. Click the link to read more about it.

You’ve heard of flash floods, but have you heard of flash droughts? These events are relatively new for natural disasters, and come on fast, with conditions going from normal to severely dry in less than one month. This means people have no time to prepare for the consequences, which can include withered crops, dried streams or depleted wells.

“Many farmers had already planted all of their fields,” says Cook. “In places without irrigation, there was nothing they could do except watch their fields completely desiccate.” Flash droughts have an unusually rapid onset and deplete water availability — particularly soil moisture — in a few weeks, or even a few days. Above-average temperatures paired with a lack of precipitation typically cause them.

. While they found significant century-to-century variation, the model showed that over one-third of all flash droughts since A.D. 1500 occurred in the 20th century.shifting the timing of the hydrological cycle However, while science is giving some insights into where and how these rapid dry outs happen, we still don’t know how to predict them.

 

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