Campaigners have demanded the world moves away from using fossil fuels, ahead of a major international report by the UN's Intergovernmental Panel on Climate Change.
The latest report will set out ways to curb rising temperatures by tackling greenhouse gas emissions.
The third of a trilogy, the study comes just two weeks after the second part of the report warned that the effects of rising temperatures were already being felt across the world.
It said that without action climate change would increasingly threaten security, health and food supplies, exacerbate poverty and damage species and habitats.
More top news
The BBC, The Daily Mail, The Guardian, and Buzzfeed were among organisations not allowed access to a government meeting.
Mexico's Foreign Minister has warned Donald Trump against imposing a tax to pay for a border wall between the two nations.
Rain will affect many northern areas at first, pushing further south through the day.