New figures out today show the number of homeless families and children in emergency accommodation has risen by over 50% since the start of the year.
According to the Department of Environment, the number of homeless adults urgently needing a bed is at a high of 3,258.
Its report also shows that in the first six months of this year the number of families seeking immediate help increased from 401 to 620, while there were over 1,300 children in emergency accommodation, a 52% rise.
National spokesperson for the Simon Community Niamh Randall said: "(One) of the areas which could be increased immediately would be an increase in the rent supplement level.
"We were absolutely shocked with the decision by the Tánaiste in March this year not to increase rent supplement levels.
"The second thing that could be done would be around rent certainty and existing housing stock - what can we use more?"