Latest figures show that the number of homeless people in Dublin has risen 35% within a year, despite over 1,200 secure housing units being made available this year.
The figures show that there were a total of 5,146 adults and children in emergency accommodation last month, a 35% increase in the year.
There were 1,026 homeless families in homeless accommodation including hotels - a 45% increase on last year.
The number of children has more than doubled from 916 to 2,110.
The total number of adults and children in homeless families is now five times what it was two years ago.
The figures were compiled by the Dublin Region Homeless Executive as an update for Dublin city councillors.
The rough sleeper count, which was conducted last night, is expected to show an increase in the number on the streets when the results are released.
Dublin Simon Community said the latest figures are showing some recent improvement.
From January to July the numbers of homeless were increasing at a rate of 3% a month.
But from August to October the rate declined to under 1%.
CEO of Dublin Simon Sam McGuinness said this was the result of measures to help those in private rental as well as more housing provision by local authorities.
Speaking on RTÉ's News At One, Focus Ireland Director of Advocacy Mike Allen said the challenge surrounding the homeless figures is to remain capable of being shocked at the way in which the problem continues to get worse.
He said that there is no one silver bullet, but the most immediate solution could be to change legislation to outlaw the practice of banks evicting tenants after they repossess properties.
"We estimate that about a third of the families becoming homeless are becoming homeless because buy-to-let landlords are being forced to sell up.
He said the legislation currently before the Dáil needs to be changed so that "it outlaws the practice where banks when they repossess buy-to-let properties evict the tenants.
"The banks, obviously, would still be able to sell the property, but they would sell the property with the tenants still in place."
Taoiseach Enda Kenny said it was not satisfactory to have children and families in hotel rooms and Minister for Housing Simon Coveney has set out an ambitious target of having no family in a hotel room through homelessness by the middle of next year.
He said the minister would bring forward a comprehensive strategy in the next couple of weeks to the Dail, which will deal with a greater degree of stability both for landlords and for tenants.