Ask ten congregational leaders what keeps them up at night, and you’ll get ten different answers. Declining attendance. A generation raised without any religious affiliation at all. Political polarization splitting congregations down the middle. Aging buildings with aging roofs. Volunteer burnout. Budgets that don’t stretch the way they used to.
These are all very real pressures, and no honest conversation about the future of faith communities should pretend otherwise. But there’s another force reshaping congregational life that rarely makes the list, even though it touches every item on it: climate change.
The climate crisis doesn’t announce itself the way a denominational schism does. Instead, it shows up quietly in a utility bill (as we talked about in an earlier post), a potluck that was cancelled because of a heat advisory, a flooded fellowship hall, or a member who stopped coming because they feel no one else shares their ecoanxiety. Because it’s quiet, it’s easy to treat as background noise rather than what it actually is: one of the most significant forces bearing down on congregational sustainability in the decades ahead.
I think when we talk about growing threats to faith-based organizations, climate change deserves a seat at the table. Even more, I’d argue it might also be the most promising opportunity faith communities have to strengthen themselves from the inside out.
The Threat Is Already in the Building
Faith communities are, among other things, physical institutions. They own buildings and land. They gather people in person, on a schedule, often across long distances in rural areas. It’s that physicality that makes them vulnerable to a warming climate. Here are some of them.
Utility costs
Older sanctuaries and fellowship halls were built for a different climate, with drafty windows and inefficient heating and cooling systems. As summers grow hotter and extreme heat and cold events become more frequent, energy bills climb. For a congregation already stretching every dollar, a spike in the utility budget can mean cutting a program, delaying a repair, or drawing down reserves that were meant for something else.
Storms and floods
Basements that once flooded every decade or so now flood every other year. Roofs built for the storm patterns of 1975 are inadequate today. Insurance premiums have risen rapidly, and in some areas coverage has become harder to get at all. A single major storm can wipe out a repair fund a congregation spent a decade building. A denominational camp I’ve been to in Colorado decided about two years ago to not get fire insurance any longer due to the cost. Faith leaders gathered at a 2025 Duke University panel put it plainly: houses of worship in disaster-prone regions are increasingly on the front line of storm response, whether they’ve planned for that role or not (Duke Research Blog, 2025).
Extreme heat and travel disruption
Many congregations, particularly in rural areas, depend on members driving long distances to attend. Extreme heat advisories, wildfire smoke, and increasingly erratic winter weather all make that drive harder or more dangerous. That’s especially true for older members, who often make up a disproportionate share of active congregants. When the weather itself becomes a barrier to gathering, attendance and participation suffer in ways that have nothing to do with theology or generational drift.
Compounding stress
None of this happens in isolation, of course. A congregation already worried about declining membership now also has to worry about whether it can afford to keep the lights on, whether the roof can withstand a derecho or 2-inch hail, and whether its oldest and most faithful members can safely make it through the parking lot in a heat wave. Climate change doesn’t replace the other threats to congregational life. It stacks on top of them, and it makes every other problem a little harder to solve. When we say that climate change is a “threat multiplier,” these impacts are examples of what we mean by that.
Regardless of what a particular congregation or its members believe about the causes of climate change, the impacts are real. A utility bill doesn’t check anyone’s theology before it arrives, and a storm doesn’t care about the faith of the people in its path. These are practical, material realities that every faith community–Christian, Jewish, Muslim, Buddhist, Hindu, Sikh, Unitarian Universalist, humanist, and beyond–will increasingly have to navigate.
The Opportunity is ALSO Already in the Building
Here’s something that often gets missed: everything that makes faith communities vulnerable to climate change also makes them uniquely positioned to respond to it. They can do this together, and in ways that strengthen the community rather than draining it.
Young people want faith communities to be climate-engaged.
Much of the conversation about declining attendance focuses on young adults leaving the faith traditions they were raised in, and on congregations of every tradition struggling to attract anyone new at all. But look closer at why that slow drift happens, and climate change turns out to be less of a side issue than it seems.
Research on why young adults leave organized religion regularly surfaces frustration that religious institutions have been slow, silent, or openly dismissive on climate change, alongside other justice issues they consider central to their moral framework. One recent analysis found that roughly a third of young adults who left the church point specifically to its posture on science, climate change included, as part of why they walked away. The same research studies consistently find that these are not people who have stopped caring about meaning, justice, or community. Rather, many are actively looking for institutions that will act on the values they already hold. A congregation, campus ministry or other faith-based organization that visibly takes climate change seriously, and does something concrete about it, is speaking a language that resonates with exactly the audience it’s often struggling hardest to reach.
For many people currently on the margins of faith communities (or drifting away from them entirely), climate engagement isn’t a distraction from the tradition’s core commitments. Instead, it’s a visible, credible expression of them. Let me be crystal clear, though: environmental programming is NOT a membership gimmick. A faith community should not make the mistake of thinking that putting on an annual Earth Day event is, by itself, a sufficient effort. Climate engagement can be a regular part of a congregation’s worship, stewardship efforts, building plans, programming, children’s ministry, and so much more.
Faith communities are built for coming together.
Long before climate change was a household phrase, congregations were doing the thing that resilience experts now say is the single most important predictor of how well a community survives a disaster: knowing your neighbors and having existing relationships to draw on when things get hard. You congregation isn’t starting from zero, in other words. It already has a phone tree and/or email list, a caring committee, a Wednesday night potluck, or a habit of checking in on the person who missed two services in a row. That relational infrastructure is exactly what climate resilience requires, and most secular institutions would have to build it from scratch.
Coordination and collaboration lower costs for everyone.
A single household looking into solar panels, a heat pump, or storm-resistant windows is entirely on its own, negotiating with contractors and financing without much leverage or help. A congregation of thirty or two hundred households is different. Group purchasing–e.g. arranging bulk solar installation, negotiating a group rate for weatherization audits, or coordinating with neighboring congregations of other traditions to buy in bulk together–can bring real savings that individual members couldn’t access on their own. Several interfaith coalitions around the country have already run successful “solar co-op” campaigns this way, and the model translates easily to almost any energy upgrade. In New Orleans, more than a dozen congregations and community institutions pooled resources through the Community Lighthouse Project to install shared solar-and-battery microgrids that keep the lights on through hurricane-driven outages).
Shared resources multiply impact.
A congregation with a generator, a walk-in cooler, or a well-insulated building becomes a genuine community asset during a heat wave or an ice storm. People know it’s a cooling center, a warming shelter, a place neighbors know they can go. Congregations that open their doors this way aren’t just serving their own members; they’re serving the wider community. What’s more, one’s faith background is irrelevant, which tends to be one of the most powerful forms of public witness a congregation can offer. This “resilience hub” model is already spreading. Bay Area congregations have added solar panels and battery backup so their buildings can shelter neighbors during excessive heat, cold, or wildfire smoke. A Detroit initiative is converting more than a dozen houses of worship into similar hubs to lower energy costs while expanding what they can offer their neighborhoods.
Land can do double duty.
Many congregations, especially in smaller towns, sit on more land than they use. That land can become a community garden, addressing food security and building relationships across generations. It can be planted with trees and native perennials that capture carbon, reduce stormwater runoff, and even lower the urban heat island effect around the building itself. It can be turned into prairie, creating a home for pollinators and wildlife while offering a reflective and beautiful “sanctuary” for individuals. In these and other ways, underused land becomes an asset instead of just something to mow.
Resilience planning builds the very muscles congregations need anyway.
Disaster planning can look like a community coming together to ask questions like, “What would we do if the power went out for three days? Who checks on our homebound members? Where would people go if it got too hot to stay home?” In addition, it’s also exactly the kind of shared purpose and collaborative problem-solving that combats the isolation and disengagement driving so much of the broader decline in participation. Congregations that have done this kind of planning often report that the process itself, not just the plan, brought people closer together.
A Universal Challenge Calls for an Interfaith and Ecumenical Response
None of this is unique to any one tradition. Practically every faith community, regardless of theology, is grappling with an aging membership, a changing climate, and buildings that weren’t designed for either. None of it requires a single tradition to solve it alone. UNEP’s Faith and Climate Action program has tracked religious communities around the world responding in strikingly similar ways, from sermons that translate climate science into moral language to renewable-energy retrofits of houses of worship, across traditions that agree on little else . That shared vulnerability is also a shared opportunity. A synagogue and a mosque and three churches in the same town can run a joint solar co-op, share a cooling-center rotation during heat emergencies, or pool resources for a community garden in a way that would be far harder for any one of them alone.
Climate change is often framed as a threat that will erode religious life the way secularism or generational disaffiliation might. That framing isn’t wrong, but it’s incomplete. Climate change is also one of the few challenges facing faith communities today that can be directly turned into an occasion for the kind of collaboration, mutual aid, and shared purpose that religious traditions have always claimed as their core strength.
To me, the question isn’t whether faith communities will be affected by a changing climate. They already are. The real question is whether they’ll meet that reality alone and reactively, or together and on their own terms as communities that have always known how to gather, share, and care for one another when it matters most.