Across the United States, headlines about global tensions and geopolitical crises often prompt difficult questions: What would happen if an international conflict ever escalated into a large-scale confrontation involving strategic weapons? While no such conflict is currently underway, defense analysts, research institutions, and scientists have long conducted scenario modeling to better understand how geography, military infrastructure, weather systems, and population distribution could influence outcomes in extreme or worst-case situations.
These studies are not predictions. They are scientific and policy-level exercises designed to help emergency planners and government officials understand potential risks and prepare accordingly. Understanding these analyses requires separating fact from fear — and recognizing what modeling can and cannot tell us about national vulnerability in scenarios that leaders and expert panels agree must be prevented at all costs.
Strategic Military Assets and Their Role in Preparedness Simulations
One major factor examined in preparedness simulations is the location of strategic military assets — particularly fixed installations that form part of a nation’s long-range defensive infrastructure. Because these installations are geographically concentrated and publicly documented, they are frequently referenced in simulations as hypothetical focal points in extreme conflict scenarios. That does not mean they are being targeted in reality. It simply reflects their prominence in strategic planning discussions.
According to research from the Princeton Program on Science and Global Security and the Brown Institute for Media Innovation, the United States maintains hundreds of land-based missile installations housed in underground silos across five states: Montana, North Dakota, Wyoming, Nebraska, and Colorado. Of roughly 450 such facilities in total, approximately 400 are believed to be actively maintained as part of the U.S. force structure.
Because these facilities are fixed and publicly documented, they form the basis for many simulations about fallout exposure and regional risk in an extreme conflict scenario. Defense scholars widely acknowledge that fixed, known facilities of this nature would likely be prioritized in a theoretical first strike aimed at degrading deterrent capabilities — which is precisely why they are maintained under constant monitoring by the U.S. Air Force and Strategic Command (STRATCOM).
How Scientists Model Risk and Exposure
Multiple academic and research institutions have developed models to estimate how radioactive fallout could spread across North America if strategic installations were struck in a major exchange. These models use real-world weather data, atmospheric transport systems, and computer simulations to produce average expected outcomes under varied environmental conditions.
For example, the study “Under the Nuclear Cloud,” supported by researchers at Princeton University and Columbia University, uses historic wind patterns and particle transport software to assess how fallout might be distributed across populations following a coordinated strike on silo fields. Their results indicate that most inhabitants of Montana, North Dakota, South Dakota, Nebraska, and Minnesota could receive average radiation doses greater than one gray — a level associated with serious health effects — depending on wind and precipitation conditions at the time.
Similarly, Scientific American has published modeled fallout maps showing that, under realistic wind conditions over the course of a year, airborne radioactive particles could spread well beyond initial target areas, meaning broad regions of the country — and even parts of Canada and Mexico — would likely be affected to some degree.
It is essential to emphasize: these exercises are not predictions of what will happen. They are planning tools used to estimate potential outcomes in worst-case scenarios, highlight vulnerabilities, explore dependencies on weather and geography, and help emergency managers develop stronger response systems.
Which U.S. Regions Appear Most Prominently in Modeling
Even in hypothetical modeling, experts consistently stress that no part of the country would be entirely unaffected in a large-scale strategic conflict. The word “safer” in this context is relative — meaning comparatively lower estimated exposure risk under specific assumptions, not absolute safety.
In many simulations, the following states are most frequently cited as bearing elevated direct risk due to the presence of silo fields and strategic installations:
Montana, North Dakota, Wyoming, Nebraska, and Colorado host concentrations of land-based missile facilities. Simulations suggest that if these were struck, the surrounding areas could experience the highest levels of immediate radioactive fallout and environmental contamination. The potential exposure in these areas, according to some models, would be significant enough to cause severe health effects without adequate shelter or evacuation measures in place.
The Midwest states of Minnesota, Iowa, and Kansas are also frequently shown in modeling to receive considerable fallout due to their proximity to these installations and prevailing wind patterns that carry airborne contaminants in their direction.
It is worth noting that these silo fields are clustered in the Great Plains and upper Midwest not for population or political reasons, but because these regions offered suitable land, distance from coastlines, and strategic depth during the Cold War. Their locations are a legacy of decades-old planning, not recent geopolitical choices.
Regions Often Modeled as Lower in Relative Exposure
In contrast, simulations frequently show lower relative estimated exposure in parts of the East Coast, Southeast, and Northeast — largely due to their distance from silo fields and the absence of fixed strategic missile sites in those areas. States occasionally ranked as comparatively lower in direct exposure risk in these models include states across New England such as Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut, as well as Mid-Atlantic and Southern states including New York, New Jersey, Pennsylvania, Delaware, Maryland, Virginia, West Virginia, North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Tennessee, Kentucky, Ohio, Indiana, and Michigan.
Some simulations also show portions of the West Coast — including Washington, Oregon, and California — receiving relatively lower cumulative exposure in average-case scenarios due to distance from primary modeled targets and prevailing wind patterns.
However, even these states could be affected by fallout drift, widespread infrastructure disruption, supply chain breakdowns, contamination of water and food systems, and long-term environmental consequences. “Lower comparative risk” does not mean “no risk,” and every major study stresses that even distant regions would be profoundly affected by a strategic exchange of any significant scale.
Why Geography Matters — But Isn’t Everything
Geography plays a meaningful role in these simulations because the location of strategic targets, prevailing wind patterns, regional topography, and population distribution all influence how energy and particles might spread in a conflict scenario. But models also consistently demonstrate several important nuances.
Weather and wind conditions can drastically change fallout distribution from day to day. A region that appears comparatively lower-risk under one atmospheric condition could be far more affected under different weather circumstances. Population centers and infrastructure hubs — including major cities, transportation networks, energy utilities, and supply chains — can suffer severe disruption even if they are not directly affected by an initial event. Economic and ecological interdependence means that even regions far from initial impact zones would feel systemic effects through disrupted food supplies, energy shortages, and cascading economic failures.
Defense policy specialists consistently emphasize that in a large-scale strategic conflict, even areas without direct impact or heavy fallout could be fundamentally altered by the broader breakdown of normal life. The models are valuable precisely because they highlight how deeply interconnected risk truly is across a modern society.
No serious analyst predicts — or even suggests — that any specific group of states would be completely spared. Instead, analysts point out that environmental contamination, social disruption, and economic collapse could extend far beyond first-strike zones.
What Preparedness Discussions Actually Focus On
Analysts, emergency planners, international security scholars, and public health experts consistently emphasize two key points.
First, strategic conflict is not inevitable. Despite periodic periods of heightened tension, nations with advanced arsenals maintain diplomatic channels, international agreements, and command-and-control mechanisms specifically designed to prevent escalation. Arms control agreements, direct communication lines between heads of state, verification regimes, and strategic dialogues all function as stabilizing measures. Simulations are invaluable insofar as they inform policymakers about vulnerabilities and infrastructure resilience — but they are not forecasts of likely future events.
Second, preparedness is fundamentally about resilience, not fear. Official guidance emphasizes risk awareness and emergency planning — whether the risk involves natural disasters, public health crises, or other large-scale emergencies. Agencies like the Federal Emergency Management Agency (FEMA) advise individuals and communities to understand evacuation routes, emergency shelters, communication plans, and basic safety principles for various kinds of large-scale disruptions. This knowledge is part of a broader public safety education framework that applies across a wide range of potential emergencies.
The Broader Context: Awareness Without Alarmism
It is understandable — in an era of rapid news cycles, geopolitical volatility, and technological change — that members of the public might feel concerned about the possibility of large-scale conflict. Headlines about military exercises, diplomatic disputes, or rising tensions can leave ordinary citizens wondering what might happen in the worst-case scenario.
However, it is essential to balance that awareness with accurate understanding. Scientific and defense models about exposure and fallout risk are not warnings of imminent events. They are exercises in preparedness designed to inform planners and policymakers. Strategic asset locations make certain areas more prominent in modeling, but geography does not create inevitability. Results depend critically on assumptions including wind, weather, conflict scale, and the decisions made by human leaders.
No part of the country offers absolute safety in any scenario, nor is there expert consensus on specific lists of targets beyond understood strategic infrastructure. Preparedness discussions in government and academia focus on infrastructure resilience, emergency response capacity, public health systems, and continuity of governance in the face of catastrophic disruptions — of any kind.
Conclusion: Grounded Realism, Not Panic
The question of which parts of the United States might face the greatest challenges in an unprecedented, extreme conflict scenario is a legitimate one for academic, defense, and emergency planning purposes — but it must be grounded in nuanced understanding, not fear.
Strategic simulations show that areas with concentrations of fixed military assets are often focal points in modeling, but these exercises are not predictions. Instead, they illuminate the nature of strategic deterrence and why certain assets are located where they are, how weather and geography shape hypothetical risk patterns, and why broad societal resilience — in healthcare, infrastructure, environment, and emergency systems — matters for any major crisis.
The overarching message from defense policy experts and scientific analysts remains consistent: preventing large-scale strategic conflict is the paramount goal of diplomacy and international governance. Preparedness, meanwhile, is fundamentally about building systems capable of protecting communities across a wide range of plausible emergencies — not about predicting or resigning ourselves to any specific catastrophic outcome.