CAS 2021 at a glance

The Climate Adaptation Summit (CAS) 2021, 25-26 January, is an online global conference to accelerate, innovate and scale up the world’s efforts in adapting to the inevitable effects of climate change.

CAS 2021 animation video

Our climate is changing.
Droughts, floods, heatwaves, wildfires, and sea level rise
mean we need to change with it.
We need to learn to work together to become more resilient.
We must adapt.


That is why the Netherlands is hosting the world’s first Climate Adaptation Summit
on January 25, 2021.
Heads of state, the scientific community,
the private sector, international organisations, and youth groups
will meet online to help the world prepare better
for the effects of climate change.
We will launch an agenda for the coming decade to accelerate adaptation action.
Be an early adapter and join us for the Climate Adaptation Summit.

[The Climate Adaptation Summit 2021 logo appears in the upper left corner of the screen. On-screen text:
Join us for the Climate Adaptation Summit
25-26 January 2021
Online worldwide]


Bringing together a range of participants, CAS 2021 responds to United Nations Secretary-General António Guterres’s call for “more concrete plans, more ambition from more countries and more businesses” to make the world more climate-resilient.

CAS 2021 preparation and follow-up

CAS 2021 will build on the advances of the United Nations Climate Action Summit and sustain momentum till COP26 in Glasgow in 2021. The Summit concludes a Year of Action, launched by Dutch Prime Minister Mark Rutte in 2019.

Video message by Dutch Prime Minister Mark Rutte

Mark Rutte - Prime Minister of The Netherlands:
My name is Mark Rutte and I am Prime Minister of The Netherlands.
I have an important message for you about our changing climate.
About our planet and its people, who are experiencing unprecedented heat, rain, storms and droughts.
A quarter of my country lies below sea level.
For centuries, we have kept our nation safe by building dikes, dams and ultra-modern flood defences.
So we know what we are talking about when it comes to coping with water and extreme weather.
But nowadays, simply coping is not enough; sea level is rising, and the weather is becoming more extreme every year.
All around the world, people are feeling the effects of climate change, despite our efforts to slow it down.
Our climate has changed and we need to change with it.
And we have to do it now.
If we do not learn to deal with the consequences of climate change, if we can’t adapt, the impact will be disastrous.
I am an optimist and I believe we can adapt to climate change if we work together.
That is why the Netherlands is hosting the Climate Adaptation Summit on the 25th and 26th of January.
Together with many global leaders I will be launching a comprehensive Adaptation Action Agenda.
But we also need your help, your expertise and knowledge to accelerate our adaptation actions.
So please join us.
I look forward to greeting you online at the Climate Adaptation Summit.

Image text: #adaptationsummit
Register on

Logo: Climate Adaptation Summit 2021

CAS 2021 represents a unique moment in time to connect initiatives, solutions and challenges to build back better and accelerate adaptation action. Building on the work of the Global Commission on Adaptation, led by Ban Ki‑moon, Bill Gates, and Kristalina Georgieva, the Netherlands government aims to use this moment to deliver an Adaptation Action Agenda for a transformational decade towards 2030.

CAS 2021 hosts and partners

CAS 2021 is hosted by the Netherlands government and supported by the country’s diplomatic network, in close collaboration with the Global Center on Adaptation (GCA). Various partners host a range of Supporting Events in the build-up, and contribute Side Events to the conference.

Inclusivity and interaction

The opportunity to showcase contributions from all over the world, highlighting the most pressing international challenges and solutions, reflects the inclusive nature of CAS 2021 as it seeks to grow the movement for accelerated adaptation action.

The High Line Park in Manhattan: obsolete city infrastructure turned green.
©Claire-Lise Havet / Beeldunie
The High Line Park in Manhattan, New York: obsolete metropolitan infrastructure turned green for a better urban microclimate.