The world’s most comprehensive disaster database – relied on by thousands of climate scientists and policymakers – is at risk of closing as a result of cuts to US foreign aid by the Trump administration.

The “emergency events” database (EM-DAT) has for 30 years provided free-to-use information on the size and impact of extreme weather events and other disasters around the world.

Its data underpins a vast range of scientific research, government policymaking, humanitarian response efforts and environmental investigations.

However, Trump’s dismantling of the federal Agency for International Development (USAid) – which provided 90% of the funding for EM-DAT – has left the future of the database in jeopardy, scientists tell Carbon Brief.

An open letter coordinated by climate scientists and signed by more than 4,000 academics and students is calling on governments, multilateral development banks and philanthropy to step in to stop the database from closing.