Climate Change is Rewriting the Hydroclimatic Operating Envelope of Mines.

Physical climate risk in mining is framed as floods, droughts, heatwaves, and wildfires acting on assets with fixed design conditions. We argue that the deeper change is a moving hydroclimatic operating envelope: climate alters the water and heat conditions around mines, while geology, engineering, and lifecycle stage govern how those changes propagate. Linking a global mine inventory to observed and projected Köppen-Geiger classes shows that 16.2% of 1093 geocoded mines changed climate subtype between 1901-1930 and 1991-2020. By 2071-2099, the share rises to 29.8% under Shared Socioeconomic Pathway 2-4.5 (SSP2-4.5) and 42.5% under Shared Socioeconomic Pathway 5-8.5 (SSP5-8.5). Water trajectories also separate. Under SSP5-8.5, median precipitation falls by 3.1% at arid mines but rises by 6.5% at humid locations, while precipitation seasonality increases in arid regions. Commodity geography stratifies this exposure, whereas mine method alone provides little adjusted separation. Tailings records place weather within multi-causal failure pathways: 64 of 229 failures with a reported cause included a weather hazard, yet raise categories did not distinguish reported climate-assessment responses. Literature links these shifts to pore pressure, infiltration, heat, material evolution, water storage, and post-closure hydrology. The combined evidence supports adaptation based on monitored, scenario-conditioned operating envelopes rather than static hazard checklists.