People are being told to stay indoors from Thursday afternoon as the Beast from the East roars across Dublin.
A red alert for snow, ice and blizzard-like conditions has been extended until at least Friday afternoon.
All schools in Leinster and Munster will stay closed for the rest of the week, and there will be very little public transport.
There will be no Dublin Bus or Bus Eireann services tomorrow, and Irish Rail and LUAS services will stop by 2pm.
All schools and colleges in red alert zones will stay closed for the rest of the week, as will many shops. An Post won't be delivering in Dublin tomorrow.
The Taoiseach says the army is on standby and Leo Varadkar says there's no threat to food security.
Social Protection Minister Regina Doherty has confirmed the fuel allowance for this week will be doubled.
Around 330,000 people will benefit from the extra 22.50 to heat their homes.
Dublin City Council
The City Council has said nine road gritting crews have salted 300km of streets.
It has decided to shut all Council offices, parks, leisure centres, libraries and bring centres on Thursday.
The Dublin Regional Homeless Executive has implemented contingency plans that will operate for the duration of the red alert.
These include 100-plus emergency placements specifically targeted at people sleeping rough.
All the main service providers have agreed to keep accommodation open for 24 hours - including using communal space for supplementary shelter.
Additional reporting by Brendan O'Loughlin and Jack Quann