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The drought gripping much of the nation is "exceptional" — the most severe classification — in an area covering 6.26 percent of the lower 48 states, according to the latest data from the National Drought Mitigation Center.

That's up from 4.21 percent the week before.

The center's latest map shows increases in size of the areas in Colorado, Kansas, Oklahoma, Nebraska and Missouri that are experiencing exceptional drought conditions.

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