The United Nations has appealed to member states to "take concrete action" to limit global temperature increases.
It comes as Secretary-General António Guterres has warned that the world is "not on track" to achieve objectives set out in the Paris Agreement.
The UN wants increases capped at 1.5°C above pre-industrial levels, which it said is necessary to prevent "irreversible changes".
The Climate Action Summit is set to take place in New York on September 23rd.
The Sinn Féin leader Mary Lou McDonald has said she is "absolutely convinced" that a deal can be reached with the DUP to restore power-sharing in the North.
Talks to get the Stormont assembly back up and running began last week, after more than two years since it sat following a row between both parties.
Ms McDonald and the British Prime Minister Theresa May are set to talk by phone on Monday.
Speaking ahead of the call, Ms McDonald said: "Sinn Féin has entered these to resolve the outstanding issues, secure rights for all citizens, and to re-establish the power sharing institutions operating to the highest standards.
A teenager is assisting Gardaí with enquiries in connection with a stabbing in which an 18-year-old man died.
It happened at around 8.10pm at Finsbury Park in Dundrum on Friday night.
The man received an apparent stab wound and was treated at the scene by emergency services.
He was taken to St James's Hospital but pronounced dead a short time later.
Some 200,000 people across Ireland and around the world have taken part in the annual 'Darkness into Light' walk.
The event is part of Pieta House's annual flagship fundraiser to remove the stigma around suicide and self-harm, and spread the power of hope.
The movement against suicide took place in 202 venues across 19 countries in five continents.
Supported by Electric Ireland, all funds raised will support Pieta to deliver counselling, therapy and bereavement services across its 15 centres in Ireland.
Trade talks between the United States and China ended on Friday without a deal.
Two days of discussions concluded on the same day the US increased tariffs on US$200bn (€178bn) of Chinese goods from 10% to 25%.
China is expected to hit back, prompting fears the 10-month trade war between the world's two largest economies could worsen.
US President Donald Trump has ordered his trade chief, Robert Lighthizer, to begin the process of imposing tariffs on the US$300bn (€267bn) remaining imports from China that have not already been targeted.