Annual climate adaptation costs estimated at $1.2 trillion... $690 billion in implementation barriers

McKinsey Global Institute estimates that global climate adaptation will require $1.2 trillion per year by 2050 under a 2°C warming scenario, covering 20 measures against heatwaves, wildfires, droughts and floods at developed-country protection levels. The estimate, published in the report “Advancing adaptation: Breaking barriers to a trillion-dollar opportunity,” includes annual operating costs and facility investment costs spread over asset lifetimes. About $690 billion of the total is classified as exposed to demand, execution and financing barriers—not funds already secured but unspent, but spending that will be difficult to implement. The finding matters because roughly 57% of the required annual outlay faces implementation risk, well above the share that is readily deployable. What to watch next is how governments and investors structure financing and delivery mechanisms to unlock the $690 billion currently stuck behind those barriers.