The volcano Calbuco, which was sleeping for almost 43 years, woke up April 22, 2015. More than 4,000 people within a 20km (12 mile) radius were evacuated. The red alert is maintained as they fear new possible eruptions.
Molten rock is flowing from the Kilauea volcano and has been for the past three months. It has travelled a distance of 12 miles (19 kilometers) and is quickly approaching the town of Pahoa which could be a disaster.
The Aral Sea was one of the four largest lakes in the world at 68,000 km2 (26,300 sq mi) but since the 1960s it has been shrinking as a result of Soviet irrigation projects diverting the river water that feeds the lakes.