Climate change affects cultural heritage by altering the environmental conditions on which buildings, archaeological sites, landscapes, cultural practices, collections, and community relationships depend. Cultural heritage includes tangible resources such as monuments, historic buildings, archaeological sites, manuscripts, artworks, objects, and culturally significant landscapes, as well as intangible practices such as ceremonies, traditional ecological knowledge, seasonal activities, crafts, food systems, and place based traditions.
Climate change can threaten these forms through rising temperatures, sea level rise, coastal erosion, flooding, drought, wildfires, changing rainfall patterns, storms, permafrost thaw, biological deterioration, and shifting ecosystems. The effects differ according to location, materials, construction methods, environmental exposure, and the adaptability of the communities responsible for heritage. Climate change can also affect the social conditions necessary for heritage transmission when people are forced to relocate or when environmental changes make traditional livelihoods impossible. Cultural heritage is therefore affected both physically and socially.
Rising temperatures can damage heritage through direct material stress and by altering biological and chemical processes. Historic buildings constructed from stone, brick, timber, plaster, metal, and other materials respond differently to heat and humidity. Repeated expansion and contraction can contribute to cracking or structural deterioration, while higher temperatures can accelerate chemical reactions and biological activity. Changes in humidity can affect wooden structures, paper, textiles, paintings, manuscripts, and other sensitive materials by encouraging mould, warping, corrosion, or other forms of degradation.
Warmer conditions can also expand the geographical range of insects and microorganisms that damage organic materials. Museums and archives may therefore face increasing demands for climate control. Outdoor archaeological sites and historic structures are more difficult to protect because they are directly exposed to changing environmental conditions. Climate change can consequently increase both conservation costs and the frequency of preventive maintenance required to protect heritage.
Sea level rise, coastal erosion, and increased flooding pose major risks to cultural heritage located near rivers, deltas, lakes, and coastlines. Historic ports, archaeological sites, religious buildings, cemeteries, settlements, cultural landscapes, and infrastructure may be exposed to permanent inundation or increasingly frequent flooding. Saltwater can be particularly damaging because salt penetrates porous building materials and can contribute to crystallisation, corrosion, and structural deterioration. Floodwater can also damage archives, furniture, artworks, archaeological deposits, and electrical systems.
Repeated flooding can produce cumulative damage even when individual events are not catastrophic. Adaptation measures may include drainage improvements, flood barriers, building reinforcement, relocation of vulnerable collections, digital documentation, controlled access, or in some cases physical relocation of structures. Such decisions involve difficult questions because moving a heritage site can protect material fabric while changing its relationship with its original landscape and community.
Wildfires, drought, and changing ecosystems can also affect cultural heritage. Wildfires can destroy historic buildings, archaeological landscapes, museums, religious structures, and cultural objects directly through heat and smoke. Drought can damage landscapes by reducing water availability and altering vegetation, agriculture, and traditional land management systems. Changes in ecosystems can affect culturally significant plants, animals, fishing grounds, forests, grazing areas, and agricultural environments.
Many intangible traditions are linked to environmental conditions, including seasonal festivals, food production, crafts using particular plants, pastoral practices, fishing traditions, and ecological knowledge. When climate conditions change, the materials or ecological cycles supporting these traditions may become less predictable. Cultural adaptation can involve changing materials, adjusting calendars, modifying agricultural practices, or relocating activities, but such changes may also alter the cultural meaning of a tradition because its historical relationship with a particular landscape is part of its significance.
Climate change can affect intangible cultural heritage through displacement and disruption of community life. If repeated flooding, drought, coastal erosion, extreme heat, or other environmental pressures make an area increasingly difficult to inhabit, residents may move elsewhere. Relocation can interrupt the transmission of place based knowledge, customary occupations, local dialects, rituals, and relationships with particular landscapes. A festival associated with a specific river, mountain, coastline, sacred site, or agricultural cycle may be difficult to reproduce after relocation.
Younger generations may have fewer opportunities to learn practices that depended on the original environment. Climate related migration can therefore produce cultural loss even when physical heritage objects survive. Conversely, communities may carry traditions to new places and adapt them, creating new cultural forms. The outcome depends on the strength of social networks, institutional support, resources, and the ability to maintain community continuity after displacement.
Climate change also affects archaeological heritage because environmental changes can expose or destroy buried evidence. Erosion may reveal archaeological material while simultaneously removing the stratigraphic context needed to interpret it. Melting ice and permafrost can expose organic archaeological remains that were preserved for centuries but become vulnerable to rapid deterioration once exposed to air and changing temperatures. Drought can reveal structures or landscape features through changes in vegetation, while flooding can disturb archaeological deposits.
These processes create opportunities for discovery but can also result in irreversible loss. Archaeologists and heritage organisations increasingly use surveying, remote sensing, photogrammetry, geographic information systems, three dimensional recording, and other documentation methods to record vulnerable sites. Documentation does not replace physical preservation, but it can provide valuable evidence when preservation becomes impossible or when sites are expected to change substantially.
Climate adaptation raises difficult questions about what exactly should be preserved and how resources should be allocated. Some heritage can be protected in place through engineering, drainage, conservation treatment, fire management, environmental monitoring, or changes in building use. Other heritage may require partial relocation, controlled abandonment, salvage archaeology, or extensive documentation before environmental conditions make continued preservation impractical. Decisions can involve competing values because heritage significance may depend on authenticity, location, material continuity, community attachment, historical evidence, or spiritual meaning.
Climate adaptation must therefore consider local communities rather than relying solely on technical assessments. Indigenous and local knowledge can be particularly important where cultural heritage is closely connected to environmental management. Effective adaptation often combines scientific climate information with knowledge about traditional landscapes, materials, seasonal patterns, and community priorities.
Climate change demonstrates that cultural heritage is not separate from environmental systems. Heritage sites and traditions exist within landscapes, climates, ecosystems, communities, and economic systems that are themselves changing. Some heritage may survive through adaptation, while other forms may be severely damaged or lost. Conservation increasingly involves risk assessment, monitoring, emergency planning, climate resilient materials, digital documentation, ecosystem management, relocation planning, and community participation.
Preventive action can reduce damage, but not every heritage resource can be protected indefinitely under changing environmental conditions. The central issue is therefore not only how to save individual buildings or objects but how to maintain cultural knowledge, community continuity, historical evidence, and meaningful relationships with places as environmental conditions change.
