The Met Office has issued yellow thunderstorm warnings for huge swathes of the country, with fears of flooding and damage to homes on its way.
Parts of the country are set to experience torrential rain, with between 20 and 30mm falling in an hour in some parts, and 50 to 80mm in three hours in others.
The warning, in place from the south west of the country to the north west, is in effect from 2pm today and lasting until 2am on Tuesday.