Flash flooding has caused chaos in many parts of the north-west following extremely heavy rainfall.
Some streets in Derry have become virtual rivers.
There has been serious traffic disruption in many areas.
And there are concerns about the damage - and cost - to a number of properites due to flooding.
The footage below was posted on the facebook page of the Grand Central Bar in Derry.
The footage was accompanied by the message: "We are now CLOSED"
The Met Office had issued a yellow weather warning for heavy rain across many parts of Northern Ireland.
But few were expecting the rain to be so heavy.
Daylight will reveal the real extent of the damage.
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