Climate Week, the global climate action platform, began on 28 September 2026 in Medellin, Colombia. This is the first time the event has been hosted in Latin America.

Medellin mayor Federico Gutierrez opened the gathering. Gutierrez stated local projects have reduced urban temperatures by 2 to 4 degrees Celsius in targeted areas.

Organisers report 13,200 registered attendees from 30 countries are participating. Prior editions of Climate Week were held in New York, London and San Francisco.