This is not consistent with the data presented in the article, which shows that the "percent of Europe's area that is dryer than normal" is historically between 5% and 25%.
[1]: http://edo.jrc.ec.europa.eu/documents/factsheets/factsheet_s...
So I think this example fails, at least. The original article is trying to make the point that Europe's soil is alarmingly, abnormally dry.