The last known large scale 'solar-superstorm' occurred in 1859, but is likely to occur every one to 200 years.
In the Carrington event, sparks were sent flying from telegraph pylons, causing fires, as energetic currents from the blast hit the earth.
Night skies were lit up by aurora displays, following a large solar flare.
At that time, there were no satellites in orbit or sensitive microchips in the path of the particles.
If an event of this scale were to hit today, the electricity grid could be affected, along with aircraft and navigation systems.
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Western areas will see the rain first but by the end of the day it will also have spread eastwards.