An indication of drought conditions is when rivers and streams run at lower than normal levels. In the USA the USGS (United States Geographical Survey) provide a daily graphical report showing a map of the USA and highlighting areas of drought. The map is color-coded to highlight the relative severity of the drought.
As an example on February 23rd a large part of North Carolina was suffering from severe drought conditions as also were parts of Virginia. Fairly large sections of the upper western USA was suffering from moderate drought.
This is an interesting map and well worth a look here.
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