All Topics

Topic pages introduce the WMO's work areas. They provide accessible information, a definition, the impact and how a topic links to WMO's work. Topics are used across the website as references.

Main themes

Water

Water

Climate

Climate

Weather

Weather

Natural hazards

Sand and Dust Storms

Sand and dust storms

a person riding a bike through a body of water.

Floods

Heatwave on the city with the glowing sun background

Heatwave

Satellite view of a large, swirling hurricane over the ocean near a continent, with a clear eye at the center and surrounding cloud bands.

Tropical cyclone

Drought

Drought

Sectors

Air Pollution

Health

Energy

Energy

flying above the clouds watching the landscape

Aviation

Earth System domains

Snow-covered mountain landscape under a blue sky with scattered clouds, featuring two prominent peaks and soft shadows on the snow.

Snow

Ice floes floating on a vast ocean under a clear blue sky, showcasing a polar seascape.

Sea Ice

Panoramic view of a glacier winding between rugged mountains under a blue sky with scattered clouds. Rocky foreground leads to the expansive ice flow, surrounded by green slopes and rocky peaks.

Glaciers and Ice Caps

Image of a satellite in orbit around the Earth

Earth observation satellites

Oceans

Ocean

Nepal's mount everest at sunset.

Cryosphere

Atmospheric phenomena

Smoke rises from a power plant at sunset.

Greenhouse gases

Silver Lining on the ocean

El Niño / La Niña