Escalating climate threats, invasive alien species and pathogens leave natural World Heritage at risk

Escalating climate threats, invasive alien species and pathogens leave natural World Heritage at risk

Abu Dhabi, UAE, 11 October 2025, (IUCN World Conservation Congress) – Climate change is now threatening 43% of natural World Heritage sites, surpassing all other threats, according to the new IUCN World Heritage Outlook 4 published today. Invasive alien species (IAS) remain the second most prevalent current threat, affecting 30% of all sites. The report also warns of a sharp rise in the risk from wildlife and plant diseases. In 9% of sites there is a high or very high threat posed by pathogens, up from just 2% in 2020.