An amber warning has been issued for heavy rains overnight for the eastern parts of Northern Ireland.
Met Office Alert – Which is the second highest level – the counties for entrance, down, and Armagh lasts on Sunday from 23:00 BST to 08:00 on Monday.
It comes in the midst of a yellow warning for the same counties that lasts from 18:00 BST on Monday to 18:00 BST.
Some areas could see flash floods with a risk of 50–75 mm in a short time.
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The Met Office has said that there will probably be a difficult driving situation as well as rapid flowing or deep flood waters will be likely to be a threat to life.
This has warned that homes and businesses may face floods, while some communities may be cut off from flooded roads.
The Met Office stated that there is a possibility of power cuts and loss of other services for homes and commercial businesses.
Warning is as follows Earlier on Sunday, alert for thunderstorms for the western counties of northern Ireland, Which ended at 20:00 BST.
Orange alert
A similar warning has been issued for the Counties Dublin, Luth and Math in the Republic of Ireland.
Met éireann (Irish Meteorological Service) Status warns of frequent and heavy rainfall with the possibility of orange alert thunderstorms.
The organization is expected to have a difficult travel situation, surface floods and potential power damage.
The alert lasts on Sunday midnight to 14:00 local time on Monday.