The drive home is expected to be busier than normal this evening. After heavy rain and floods, traffic was extremely heavy this morning.
Gardai say lanes on a number of roads across Dublin are still affected by flooding.
One lane is blocked on the M4 outbound near Maynooth, at junction 4. Local diversions are in place on the N3 Blanchardstown. The road is closed from Clonee Junction 4 inbound. Diversions are in place via Damastown Road to the N2, to access the M50.
Met Eireann issued a status yellow rainfall warning with widespread heavy showers expected until 9pm tonight.
Temperatures are expected to drop significantly later today with chances the rain could turn to sleet.#
"Over the next three of four days, we'll see the much colder weather ... later this morning or afternoon", says forecaster with Met Eireann John Eagleton.
"For the rest of the week, temperatures are going to stay low. Winter has finally arrived".