<strong>Laying low:</strong> The Loire in France has almost disappeared in places.
Laying low: The Loire in France has almost disappeared in places.
Raphael Lafargue/Abaca/Sipa/AP
<strong>Out on a limb:</strong> The Rhine is a popular river cruise, but its future is now in doubt.
Out on a limb: The Rhine is a popular river cruise, but its future is now in doubt.
Michael Probst/AP
<strong>Facing ruin: </strong>Lake Garda is approaching historic lows, giving more land to the likes of Roman Sirmione.
Facing ruin: Lake Garda is approaching historic lows, giving more land to the likes of Roman Sirmione.
Antonio Calanni/AP
<strong>Feeling blue: </strong>Budapest looks different to locals, but tourists are still enjoying the Danube.
Feeling blue: Budapest looks different to locals, but tourists are still enjoying the Danube.
Anna Szilagyi/AP
<strong>An unprecedented disaster: </strong>Italy's Po river is at historical lows, with boats unable to pass in places.
An unprecedented disaster: Italy's Po river is at historical lows, with boats unable to pass in places.
Francesca Volpi/Bloomberg/Getty Images
<strong>Not just Europe:</strong> Lake Mead, in Nevada, is at historic lows too.
Not just Europe: Lake Mead, in Nevada, is at historic lows too.
Ethan Miller/Getty Images
<strong>Careful now: </strong>The UK landscape is tinder-dry around heritage sites like Stonehenge.
Careful now: The UK landscape is tinder-dry around heritage sites like Stonehenge.
Toby Melville/Reuters
<strong>From bad to worse: </strong>Flash floods often follow drought, as seen in Yellowstone last month.
From bad to worse: Flash floods often follow drought, as seen in Yellowstone last month.
Jacob W. Frank/National Park Service/Getty Images
<strong>Slim pickings:</strong> Boats are having problems on the Elbe river, too.
Slim pickings: Boats are having problems on the Elbe river, too.
Philipp Schulze/Picture Alliance/dpa/AP
<strong>Hidden depths: </strong>In Budapest, Margaret Island is getting bigger as water levels plummet.
Hidden depths: In Budapest, Margaret Island is getting bigger as water levels plummet.
Anna Szilagyi/AP
<strong>Nowhere to run: </strong>The Rhine's falling water levels are devastating both trade and tourism.
Nowhere to run: The Rhine's falling water levels are devastating both trade and tourism.
Michael Probst/AP
<strong>Walking on water: </strong>Some parts of the Rhine, like this near Bingen, are now walkable.
Walking on water: Some parts of the Rhine, like this near Bingen, are now walkable.
Michael Probst/AP