Mean soil sealing in Europe's cities (UMZ) in 2006 and modelled change of number of tropical nights (Tmin > 20 °C) during summer between 1961–1990 and 2010–2040 indicating higher risks of heat waves - eps file | Mean soil sealing in Europe's cities (UMZ) in 2006 and modelled change of number of tropical nights (Tmin > 20 °C) during summer between 1961–1990 and 2010–2040 indicating higher risks of heat waves