Thick clouds of smoke rising into the sky.

Thick clouds of grey smoke rising into the sky.

Thick clouds of grey smoke rising into the sky as a volcano erupts.

Thick clouds of grey smoke rising into the sky as a volcano erupts. Rock from the volcano crumbles into the molten lava below.

Thick clouds of smoke rising into the sky as a volcano erupts.

Ayutthaya, Thailand: Houses and temples submerged by flood water, a woman wades in a flooded street.

Oklahoma, USA: A powerful tornado tearing through a field with dirt spiralling around the tornado column.

Sequence of shots showing a tornado swirling and spiralling across the sea, stirring up water off Limasol in Greece

Chunks falling off the Perito Moreno glacier in Santa Cruz, Argentina.

Texas, USA: A large tornado forming with lots of dust swirling ominously between the tornado cloud and ground.

Texas, USA: Black tornado clouds gathering in pink sky, a tornado vortice gathers and disappears.

A huge black cloud of smoke rises in the distance.

Thick smoke clouds and flames rise into the sky.

Manitoba, Canada: A large black tornado column fiercely rotating over a field.

Aerial of stranded white truck in flowing flood waters

Kansas, USA: A white tornado column reaching to the ground. Camera zooms in as the tornado hits a dwelling behind trees and debris flies violently in the rotating air.

Black smoke clouds rising over a train on fire.

Iceland: Air views of erupting volcano under the Eyjafjallajokull glacier showing rising voluminous ash cloud.

A thick plume of grey smoke billows into the air.

Manitoba, Canada: A massive black tornado column rotating over a field with dust and debris swirling in the powerful winds.

Louisiana, USA: Air to Air shot of a Blackhawk helicopter delivering sand for a breakwater.

Manitoba, Canada: A large tornado with dark clouds rotating powerfully.

Thick smoke clouds rise into the sky, above an area of buildings.

Manitoba, Canada: Zoom in toward a massive black tornado. Huge swirl of dust and air rotates over a field ominously.

Iceland: Various shots of erupting volcano with voluminous ash clouds.

Thick smoke clouds rise into the sky.

Front view of a train on fire. Black smoke clouds rise above the train.

Louisiana, USA: Close up shot of a pelican sitting in oily water and covered in brown oil residue.

Manitoba, Canada: A huge black tornado cloud over field, the camera zooms in to show the tornado's three vortices fiercely swirling on the field.

Back shot of two armed men watching black smoke clouds rise above a train on fire.

A Dirigible (airship) catches fires in midair and plummets to earth.

Manitoba, Canada: A massive black tornado column over a field with debris flying in the wind.

Iraq: A plume of black smoke and fire billowing from a pipeline.

An anonymous person holds a bird covered in oil carefully in his hands.

Manitoba, Canada: A huge black tornado with three vortices swirling. The vortices join into one huge tornado and then split into separate vortices again.

An unidentified person shovelling up oily sand on a beach.

Brown water flowing along street then camera pans up to show flooded village street with bright sunlight reflected on water

Close shot of line of cars submerged in water at night then camera zooms out to show completely flooded street bathed in orange street light

Oklahoma, USA: A huge tornado with a large debris cloud swirling around it seen from a reversing car.

Oklahoma, USA: A fierce tornado tearing through a field lifting up debris and vegetation which swirls around the column of the tornado.

Thick, dark smoke clouds rise into the sky, above an area of buildings.

Mexico: Aerial view of boats positioning oil containment booms on the ocean surface

Time-lapse speeded up shot of muddy ground drying and cracking quickly around decayed white wildebeest skull with one horn

Raging torrents of water spill over a waterfall.

Manitoba, Canada: A massive black tornado column fiercely rotating over a field.

Manitoba, Canada: A massive black tornado swirling over a field with rain and hail falling.

Unrelenting rains shroud the Australian outback in a thick, grey, mist. In the foreground, violent winds cause trees to bend dramatically.

Pakistan: Various air views of flooded regions of Pakistan including Sujawal City submerged in floodwater.

Manitoba, Canada: Zoom towards a huge black tornado which has several vortices.

Oily waves washing up onto the sand on a beach in Taean, South Korea.