Art Environment

The Museum in a Hotter World

Frans Post, “A Brazilian Landscape”, (1650). The Metropolitan Museum of Art, Public Domain (CC0).

How climate change is forcing cultural institutions to rethink conservation, energy and public responsibility

IE by intendle Editors Aug 7, 2026 · 15 min read

By: intendle Editorial
Status: Editorial review edition
Prepared: 5 August 2026

The air inside a museum is meant to feel uneventful. Temperature changes slowly. Humidity is held within a narrow band. Light is controlled. Dust is filtered. A visitor sees a painting, a sculpture or a manuscript, while the building performs an invisible act of resistance against time.

Outside, that promise of stability is becoming harder to keep.

The World Meteorological Organization reported that 2025 was the second or third warmest year in the modern record, at about 1.43 degrees Celsius above the 1850-1900 average. The years from 2015 to 2025 were the eleven warmest on record. Heat, intense rainfall, wildfire, drought and rising seas are no longer distant scenarios for cultural institutions. They are operational conditions. A museum may now face a flooded loading dock, smoke entering an air-handling system, a power failure during extreme heat, saltwater threatening a coastal archive or a collection store designed for a climate that no longer exists.

The environmental question for museums is therefore not whether preservation should be sacrificed to sustainability. It is how preservation must change when the methods once used to protect collections are themselves energy-intensive, financially brittle and increasingly vulnerable to the climate they were designed to exclude.

The white cube was never outside nature

The modern museum often presents itself as a sealed interior. Its galleries seem detached from weather, season and geography. That appearance is a technical achievement. It depends on insulation, mechanical cooling, heating, dehumidification, humidification, filtration, lighting, security systems and, frequently, round-the-clock operation.

For decades, many collecting institutions treated a temperature close to 70 degrees Fahrenheit and relative humidity close to 50 percent as a default benchmark. The values were easy to communicate and convenient for loan agreements. They also encouraged the idea that a single narrow indoor climate could protect every collection in every region.

Conservation science has steadily complicated that assumption. Different objects respond differently to environmental change. A wooden panel, a contemporary acrylic painting, a photographic print, a bronze sculpture and an archaeological textile do not have identical needs. The risk created by a short fluctuation is not necessarily the same as the risk created by sustained damp, repeated cycling, condensation or uncontrolled heat. Stability matters, but stability does not always require one universal number.

The 2014 declaration developed by ICOM-CC and the International Institute for Conservation argued that museum sustainability must be treated as a central criterion, not a peripheral concern. It encouraged passive methods, lower-energy approaches and collection care that does not automatically assume intensive HVAC. The Bizot Green Protocol, updated in 2023 and republished by the Association of Art Museum Directors in 2026, continues that shift. Its premise is not careless relaxation. It is evidence-based, collection-specific risk management supported by trust between lending institutions.

This distinction is essential. A museum that widens temperature and humidity parameters without knowing its building, objects or local climate is not acting sustainably. It is transferring risk. A museum that studies its collections, monitors actual conditions, creates microclimates for vulnerable objects and reduces unnecessary mechanical control is making conservation more precise.

The energy cost of certainty

Art museums are often unusually demanding buildings. A 2025 report from the American Alliance of Museums described earlier research across 243 cultural buildings in which art museums had the highest median energy-use intensity and the highest year-round thermal baseload. The reported median site energy-use intensity for art museums was 168, approximately two to three times the levels found in many offices, libraries and schools. Strict temperature and humidity requirements were a major reason.

That does not mean every museum is wasteful. It means the environmental burden of collection care is structural and measurable. It also means that serious reductions can come from technical decisions that visitors may never notice.

The Metropolitan Museum of Art announced a nearly 25 million dollar lighting-efficiency project in October 2025, including almost 20,000 LED fixtures across 324 galleries and replacement of sixteen lighting-control systems. In Los Angeles, Getty, LACMA, MOCA, the Hammer Museum and Hauser & Wirth announced a collective climate commitment in 2026. MOCA described a responsive approach to temperature and relative humidity, aligned with the Bizot Green Protocol and tested in relation to the actual requirements of works on display and the local climate.

The National Gallery of Victoria received recognition in 2025 for an adaptive climate-control strategy. The significance of such projects lies less in their publicity than in their method. Lighting, environmental controls, refrigerants, storage design and operating schedules become part of curatorial responsibility. The museum no longer treats the plant room as separate from the gallery's ethics.

From rigid rules to adaptive care

The emerging model of sustainable conservation has several layers.

First, institutions need better information. The Min/Max research project in the United States is studying the financial, energy and greenhouse-gas consequences of broader temperature and relative-humidity parameters in eight art museums. The purpose is not to produce a new universal setting. It is to create tools that allow museums to connect collection risk, building performance and local climate.

Second, vulnerable objects may need smaller, targeted environments rather than an entire building held to the needs of its most sensitive item. Display cases, sealed frames, conditioned storage cabinets and carefully designed enclosures can provide microclimates while allowing larger rooms to operate more flexibly.

Third, passive performance matters. Shading, insulation, thermal mass, air movement, moisture buffering and the orientation of storage areas can reduce dependence on mechanical systems. These methods are not nostalgic. They are forms of resilience. A building that can protect its contents for several hours or days without full power is safer during an emergency than one that immediately loses control when machinery stops.

Fourth, museums need to distinguish ordinary operating targets from emergency thresholds. A building may not maintain ideal conditions during a heatwave, wildfire or grid failure. It should, however, know which collections are most vulnerable, how quickly conditions are changing, which spaces can be isolated, and where emergency power has the greatest value.

Climate risk is also collection risk

A warmer climate does not create one single museum emergency. It creates interacting hazards.

Extreme heat raises cooling demand precisely when power systems are strained. Heavy rainfall can overwhelm drains, roofs and basements. Wildfire introduces flame, heat, soot, ash and contaminated air. Drought can increase fire danger and alter soils beneath buildings. Sea-level rise and storm surge threaten coastal museums and archives. Warmer and more humid conditions can increase risks from mold, insects and corrosion. Rapidly melting ice is revealing archaeological material that must be documented and conserved before it decays, a new urgency highlighted by ICOM-CC during the 2025 International Year of Glacier Preservation.

The cultural damage is not evenly distributed. A major institution may have engineering teams, offsite storage, insurance, backup generators and access to conservators. A local museum, Indigenous cultural center or community archive may have one building, a small staff and collections that exist nowhere else. The same flood can therefore produce radically different levels of loss.

Climate adaptation must account for this inequality. International guidance is valuable, but a solution designed for a large museum in a wealthy city may be impossible in a rural institution, on a small island or in a region with unstable electricity. The most useful standard is not the most technologically elaborate. It is the standard that can be maintained, repaired and understood locally.

A museum can be more than a protected box

As climate risk grows, museums are also being asked to reconsider their civic role. ICOM's work with the G20 in 2025 described the Old Harbour Museum in South Africa as a place that responded to storm surges by offering shelter, communication, solar-powered emergency systems, water purification and practical guidance. Its climate work also connected local fishers, poets, scientists and young people through stories about coastal change.

This model is important because it moves beyond the museum as a building that protects objects from the public and the weather. The institution becomes a form of local infrastructure. It can preserve memory, explain risk, provide trusted information and, in some circumstances, offer physical safety.

At COP30 in Belem in November 2025, culture entered the official climate Action Agenda for the first time, and culture-related indicators were adopted under the Global Goal on Adaptation. UNESCO and ICOM have since argued that cultural knowledge, heritage and institutions should be integrated into national adaptation plans and climate policy. This shift gives museums a larger responsibility. It also creates a danger: cultural institutions may use the language of resilience without changing their own operations.

A museum cannot credibly stage exhibitions about ecological crisis while refusing to measure energy, freight, waste and climate risk. Nor should it assume that carbon reduction alone completes the task. Sustainability also concerns staff conditions, public access, community participation, material use, biodiversity, financial durability and the distribution of resources.

The museum's new preservation contract

The strongest environmental museum strategy is neither symbolic nor purely technical. It connects five forms of care.

Care for collections: identify the actual vulnerability of objects, monitor conditions, use microclimates where necessary and avoid both neglect and unnecessary control.

Care for buildings: reduce energy demand, maintain systems, improve passive performance, replace inefficient lighting and equipment, and plan for power loss, smoke, flood and heat.

Care for people: protect staff and visitors during extreme weather, create accessible emergency procedures and recognize museums as possible community assets.

Care for knowledge: work with scientists, conservators, engineers, artists, local residents and Indigenous knowledge holders rather than treating climate expertise as a single discipline.

Care for the future: publish targets, report progress, fund maintenance and refuse environmental claims that cannot be measured.

The museum of the twentieth century often promised permanence by holding the world outside. The museum of the twenty-first century will need a different form of permanence. It must accept that weather, energy, ecology and social trust are already inside the building.

Good conservation will not mean choosing the object over the planet. It will mean understanding that an institution cannot preserve the evidence of human culture by helping to destabilize the conditions in which culture can continue.

1. Does relaxing museum climate control put artworks at risk?

It can, if parameters are changed without collection data, monitoring or professional review. The contemporary approach is not to abandon environmental control. It is to replace universal settings with risk-based, object-specific care. Stable conditions remain important, particularly for vulnerable materials. The difference is that an entire building does not always need to be maintained at the narrowest conditions required by a small number of objects. Microclimates, sealed frames, conditioned cases and specialized storage can protect sensitive works while other spaces operate within broader, evidence-based ranges. The Bizot Green Protocol and the ICOM-CC declaration support this direction, but implementation must be adapted to local climate, building behavior and the actual collection.

2. Which climate hazards are most dangerous for museums?

Water is often the most immediately destructive, whether it comes from river flooding, storm surge, roof failure, drainage overload, firefighting or broken pipes. Heat, prolonged damp, wildfire smoke, soot, power failure and pest activity can compound the damage. Risk depends on location and collection type. Coastal museums must examine sea-level rise and saltwater. Institutions in fire-prone regions need smoke filtration, evacuation and salvage plans. Museums in hot cities must plan for grid stress and extreme indoor temperatures. The essential task is a local risk map that connects hazards to specific rooms, systems, objects and response capacities.

3. Can museums function as climate shelters?

Some can, but only through deliberate planning. A museum that offers refuge during heat, flood or storm needs safe access, reliable power, water, communication, trained staff and a clear relationship with emergency services. Collections security and public safety must be designed together. The Old Harbour Museum case discussed by ICOM shows how a cultural institution can combine emergency infrastructure with local climate education. This should not become an unfunded expectation placed on every museum. Where the role is appropriate, governments and emergency planners must support it as civic infrastructure.

4. Should museums close galleries during extreme heat to save energy?

Temporary closure can be a responsible measure when visitor safety, collection safety or power reliability is at risk. It should not be treated as the first or only strategy. Better insulation, shading, adaptive schedules, efficient systems, microclimates and planned temperature ranges can reduce the need for emergency closure. Some exhibitions have already accepted partial closure during hotter periods rather than using maximum climate control. The key is transparency: visitors should understand whether a closure is required for safety, conservation or energy management, and institutions should publish the longer-term improvements that reduce repeated disruption.

5. How can a small museum adapt without a large capital budget?

Begin with information and maintenance. Inspect roofs, drains, gutters, doors, windows and collection storage. Move vulnerable objects away from floors and exterior walls. Record temperature and humidity before purchasing new equipment. Identify the rooms that perform best passively. Create a salvage priority list, emergency contacts and staff drills. Use simple enclosures and moisture-buffering materials where appropriate. Coordinate with local fire, flood and emergency agencies. Large mechanical upgrades may eventually be necessary, but many losses occur because basic vulnerabilities were unknown, responsibilities were unclear or maintenance was deferred.

6. What should visitors expect a credible museum climate plan to disclose?

A credible plan should identify a baseline, major emission sources, reduction targets, progress dates and the scope of what is measured. It should explain how collection care is protected while energy is reduced. It should also address climate adaptation, not only carbon. Visitors should be able to find information about building energy, freight and travel policies, waste, emergency planning, governance and community participation. A single exhibition about climate change is not a climate plan. Credibility comes from measured operations, public reporting and evidence that environmental responsibility shapes budgets and decisions.