“Hurricanes Harvey and Irma and Maria and the massive floods in South Asia are just the most recent demonstration of the urgency of tackling climate change ,” said Guterres in his remarks to the Leaders’ Dialogue on Climate Change, held on Tuesday on the margins of the high-level session of the General Assembly.

“Such events will only become more frequent and more savage, with more dramatic humanitarian and economic consequences,” he added.

In 2020, parties to the Paris Agreement on climate change, which entered force in 2016, will review progress made to date.

“By then, we need to make sure that we have substantially raised the bar of ambition,” Guterres said, outlining six issues to focus on: investment in clean technology; carbon pricing; the energy transition; risk mitigation; augmenting the contribution of sub-national actors and business; and mobilizing finance.

“Momentum is growing. Now let’s make it grow even more,” he said.

Yesterday, the Secretary-General addressed a gathering of global leaders from local governments, the private sector and civil society, which was also attended by California Governor Edmund G. Brown Jr; UN Special Envoy for Cities and Climate Change Michael R. Bloomberg; and former US Vice President Al Gore.

“Climate change is not a distant problem for future generations,” he told them. “It is here, now, and we need to deal with it.”

Both meetings were held to forge alliances for implementing the Paris Agreement in the run-up to a Climate Summit Guterres plans to hold in 2019.