Water, for example, has long been a critical consideration in firefighting. A fire engine can carry water to an incident, but a major structural fire may require a continuous supply far greater than the vehicle's onboard capacity. Firefighters therefore depend on hydrants, water systems, pumping equipment, and reliable access to additional supplies.
The book describes how firefighters in Nogales, Arizona, had historically provided water to their Mexican counterparts in certain situations. Hoses could be passed through openings in the border barrier, allowing crews to use available resources without moving entire vehicles across the international boundary.
In other circumstances, American fire engines could supply water to Mexican tankers, which would then transport it to the scene of a fire.
These arrangements illustrate how emergency services can adapt to local conditions. Rather than allowing a border to prevent every form of assistance, firefighters developed practical methods of sharing equipment and supplies when circumstances permitted.
The history also highlights the importance of trust. Emergency responders must be able to communicate clearly, understand one another's capabilities, and coordinate their activities without creating additional hazards.
Firefighting is already dangerous work. Crews must assess structural stability, monitor heat and smoke, manage water pressure, protect escape routes, and avoid exposing themselves or others to unnecessary risks. When more than one agency becomes involved, coordination becomes even more important.
Cooperation across an international boundary adds further considerations, including jurisdiction, communications, equipment compatibility, and the procedures governing assistance.
The relationship between the two Nogales fire departments demonstrates why these connections matter before a disaster occurs. Familiarity between neighboring agencies can make it easier to identify opportunities for assistance when time is limited.
In an emergency, firefighters cannot afford to begin building every relationship from scratch. The ability to communicate and cooperate often depends on connections established long before the alarm sounds.
The Hotel San Enrique fire was therefore part of a much broader story: two neighboring communities learning how to protect people more effectively by working together.
Emergency Planning Beyond Political Boundaries
The cooperation seen in Nogales also reflects a wider approach to emergency management along the U.S.–Mexico border.
The U.S. Environmental Protection Agency has documented binational prevention and emergency response plans for several pairs of neighboring communities. These include Nogales, Arizona, and Nogales, Sonora, as well as communities such as Douglas, Arizona, and Agua Prieta, Sonora.
The plans address the need to coordinate when emergencies involve hazards that may affect people, property, or the environment on either side of the border.
Official resource: U.S. Environmental Protection Agency — Cross-Border Contingency Plans for U.S.–Mexico Sister Cities.
Such planning is important because emergencies rarely follow neat administrative boundaries.
A chemical release could expose people across a border to dangerous fumes. A large fire could threaten nearby buildings or infrastructure. An accident close to a port of entry could disrupt transportation and create risks for people moving through the area.
Even when an incident is contained within one country, its effects may extend beyond the location where it began.
Effective emergency planning therefore requires more than having enough vehicles and trained personnel. It also requires clear communication, defined responsibilities, compatible response procedures, and an understanding of how neighboring agencies can support one another.
The Nogales Fire Department's official description of its operations emphasizes public safety, fire suppression, emergency medical services, hazardous materials response, and technical rescue. It also identifies coordination with surrounding public safety agencies as part of its work.
Official resource: City of Nogales, Arizona — Fire Department.
These responsibilities show that modern fire departments must prepare for a wide range of emergencies. The ability to coordinate with other agencies can be especially valuable when an incident is too large, too complicated, or too close to a boundary for one department to manage comfortably on its own.
However, cooperation does not mean that every fire department can automatically cross an international border whenever it chooses. Assistance must take account of the circumstances, applicable procedures, and the authority of the agencies involved.
The 2012 incident was distinctive partly because the firefighters found a way to help while remaining on their own side of the boundary.
Their ladder truck created a physical connection across the barrier, allowing them to contribute to the firefighting effort without requiring the vehicle or crew to enter Mexico.
It was a reminder that international cooperation does not always need to be dramatic or complicated to be meaningful. Sometimes, it involves recognizing a shared problem and using available resources to reduce the danger.