Ben StevensAn amber warning for heavy rain has been issued for eastern parts of Northern Ireland overnight.
The Met Office alert – which is the second highest level – for Antrim, Down, and Armagh lasts from 23:00 BST on Sunday until 08:00 on Monday.
It comes in the middle of a yellow warning for the same counties which runs from 18:00 BST on Sunday until 18:00 BST on Monday.
Some areas could see between 50-75 mm of rain in a short amount of time, with a risk of flash floods.
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The Met Office has said there will probably be difficult driving conditions as well as fast flowing or deep flood water likely to cause danger to life.
It has warned that homes and businesses may face flooding while some communities could be cut off by flooded roads.
The Met Office added that power cuts and loss of other services to homes and business businesses are likely.
The warning follows an earlier alert for thunderstorms for western counties of Northern Ireland on Sunday, which expired at 20:00 BST.
Orange alert
A similar warning has been issued in the Republic of Ireland for counties Dublin, Louth and Meath.
The Met Éireann status orange alert warns of persistent and heavy rain with a chance of thunderstorms.
The organisation expects difficult travelling conditions, surface flooding, and possible lightning damage.
The alert lasts from midnight on Sunday until 14:00 local time on Monday.
