There is precedence for coastal cities and regions using ocean water for fire control.

After the devastating 1906 earthquake, which triggered massive fires, San Francisco constructed the Auxiliary Water Supply System (AWSS). This system includes a network of high-pressure pipelines connected to reservoirs and cisterns, with the ability to draw ocean water in case of emergencies. While the AWSS primarily uses freshwater, it can switch to ocean water if necessary.

In Sydney, coastal areas have occasionally relied on seawater for firefighting during large wildfires.
Helicopters equipped with buckets often scoop ocean water to drop on fires in nearby bushland or coastal regions.

Greece, a country prone to wildfires, has used seawater extensively in coastal areas. Helicopters and firefighting planes such as the Canadair CL-415 scoop ocean water to extinguish fires in hard-to-reach areas.

Valparaíso, a port city with a history of catastrophic fires, has used ocean water to combat urban fires. Firefighting aircraft and portable pumps are employed to draw seawater when freshwater resources are insufficient.

Tokyo has an advanced firefighting system capable of utilizing ocean water for fire control in emergencies. This is especially relevant in a city prone to both earthquakes and fires.