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The colours you see when a rainbow appears are the result of light being split into its various individual wavelengths.
How long does rain take to reach the ground and where is the wettest place in the world? Find out some interesting facts about rain.
Find out what rain is and the different types it can take.
Advice and guidance for protecting yourself and your home in heavy rain and flooding.
Please note that when changing units, only forecasts and maps will be affected.