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

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.

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

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.

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

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

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

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.

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

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

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.

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.

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

Kansas, USA: A tornado cloud fiercely rotating dust high above ground with debris flying in air. Camera zooms out to show the tornado as it tears through countryside.

Wide shot of heavy snow blowing fiercely past a snow covered mountain face.

Kansas, USA: A white tornado column ripping through countryside.

Man jumps from a small plane and skydives in the clear blue sky.

Two men in orange emergency dinghy along in flood water then camera zooms out dramatically to show aerial of flooded Yorkshire countryside

Travelling aerial views over flooded fields in the Yorkshire countryside

White ambulance driving towards camera down street and trees blowing in violent wind and heavy rain during Hurricane Wilma in Mexico

General view of flooded street at night with dustbin floating along on its side in flood water, orange street lights reflect on water

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

Ecuador, scenic wide shot overlooking a lagoon in heavy rains. Stormy skies reflect off water creating an unusual purple tinge.

Low-level view of flood water flowing along suburban street at night with house and telephone box in background and moonlight reflecting on the water

Africa, Wide shot of a lone tree seen through a shrouding heathaze as a fire burns in the foreground.

Close view of No Entry road sign sticking out of water in flooded street with rubbish debris floating on surface

Sea-level view of Air-Sea rescue Sea King helicopter hovering over turbulent sea, two people are hoisted down from helicopter into rescue dinghy boat as choppy waves lash against camera lens

Base jumpers leap in unison off a tall Tower, the Menara Telecommunications Tower in Kuala Lumpur, Malaysia. Their parachutes open as they fall through the air.

Antarctica, wide shot of the sun bursting from behind angular mountain peaks and snow blowing

Scenic wide shot, Southern Africa. Storm clouds threaten and a small tornado gains strength as it traces arid terrain.

Antarctica, wide shot of a fierce wind blowing snow down icy terrain. Yellow hue to shot.

Sequence of shots showing 'Stop' traffic sign blowing in wind and roof of motel balcony being blown down during Hurricane Georges in Florida, America.

Camera follows person in protective clothing travelling on snowmobile (snow scooter or sled) from left to right along road in snowy landscape in the Arctic Circle in Canada

Southern Africa, camera pans to follow a small tornado as it moves across dry savannah grasslands.

Medium shot of a surfer riding a wave in California. He is wearing a yellow and black wetsuit as he rides on wave on his surfboard.

Arctic. Wide shot of snow gusting horizontally past angular, rocky terrain with two gulls sitting on the rocks.

Aerial of stranded white truck in flowing flood waters

General view of small weather station building with large satellite dish and telegraph poles along horizon of snowy Arctic landscape, with bright almost starburst sun shining in sky and small ridges of snow in foreground

Travelling point-of-view shot from interior of car driving along tree-lined road during violent wind and rain of Hurricane Ivan in Jamaica, windscreen wipers move across window then tree branch falls onto glass and cracks windshield

Close up view of flames and smoke rising from a forest fire.

Side view of flood water gushing through railings on main street in Carlisle as emergency worker clings to railings above and attempts to cross flowing torrent rushing underneath

Rescue workers wearing fluorescent yellow coats paddle through flooded road in small boat towards camera in Carlisle

White van in middle of Californian desert. Suddenly it explodes into a big flame and as the flames clear, thick dark clouds of smoke appear and bits from the van fly in slow motion through the air, including the van's license plate.

Wide shot across arctic ridges. White snow blankets the gentle slopes.

Close view of Arctic explorer Jim McNeill carrying out environmental tests at the Canadian Arctic - shows close view of McNeill's hands in protective clothing turning large hand drill then camera pans up to show his face

Arctic explorer McNeill pulling sledge along towards camera in the Arctic Circle in Canada, McNeill is using ski poles and wearing red overalls with brown furry hat and gloves

Farallon Islands, California, USA: Underwater view of surfer lying on surfboard just about to break through surface of sea