Limerick City and County Council says an increase in water levels of 120 mm was measured on the Lower River Shannon at Castleconnell on Friday and overnight.
Council staff are continuing pumping operations in Castleconnell and Montpelier and two more pumps have been deployed to respond to the increase in water levels.
Flood defences are being maintained at other flood prone locations along the river with sand bags being reinforced as required.
The Mulkear River rose to 3 metres at 6.00am this morning (Saturday) causing overspill on roads.
Levels in the Mulkear are now dropping and the Mountshannon Road is passable. No property was affected.
Monitoring and pumping continue and Limerick City and County Council says staff remain on alert to ensure that the necessary responses can be immediately activated where the need arises.
Meanwhile, the Council has confirmed that the ESB is maintaining the spill rate at Parteen Weir at 470 cubic metres per second (cumecs) during today (Saturday, 2 January 2016).
Flooding advice is available on www.flooding.ie. Information included on the website includes advice on identifying flooding risks, protecting property against flooding, necessary steps to be taken if a property is flooded, and assessing and repairing property damaged by flooding.