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US drought worsens after weeks of improvement

ST. LOUIS — The worst US drought in decades has deepened again after more than a month of encouraging reports of slowly improving conditions, a drought-tracking consortium said Wednesday, as scientists struggled for an explanation other than a simple lack of rain.

While more than half of the continental United States has been in a drought since summer, rain storms had appeared to be easing the situation week by week since late September.

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But that promising run ended with Wednesday’s weekly US Drought Monitor report, which showed increases in the portion of the country in drought and the severity of it.

It showed that 60.1 percent of the lower 48 states were in some form of drought as of Tuesday, up from 58.8 percent the previous week.

The amount of land in extreme or exceptional drought — the two worst classifications — increased from 18.3 percent to 19.04 percent.

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