Seattle is a major city built before the Great War. After the War, it was considered a stable, self-efficient city, until 2301, when a massive plague began to infect and kill its population, causing a major epidemic. It is the main setting for the film Fallout: Seattle Plague (see film treatment).
For unknown reasons, when the nuclear warheads hit, few were aimed at Downtown, most hitting residential areas or even water. Because of this odd occurrence, the city's infrastructure is surprisingly intact, while at the same time suffering a catastrophic death toll. While the mayor was killed, the City Council was in session at City Hall, so all members survived and were able to maintain some level of control as survivors ran towards Downtown in all of the chaos. With the Federal Government seemingly gone, the Seattle Police Department and surviving military factions were merged into a new faction, the Emerald Guard, who tirelessly guards the city from any and all threats.
For decades now, the expanding New California Republic has been trying to annex the city. Many, both in the NCR and out, believed the NCR would start to slow its expansion after its failure in the Mojave, but this was proven more than wrong. With Seattle's large food supplies and working power, the NCR's attempts to annex them have grown exponentially, trying everything but sending in the military.
In 2301, a group of super mutants immigrated to Seattle from an unknown region, looking for opportunity. It was that same year that a previously unknown plague, nicknamed "Green Death" for the oddly green sores that appear on a person, began to spread throughout the city. The plague is fatal after only a few days and spreads rapidly, killing hundreds of people in its first month. While the super mutants are immune to the disease, the bad timing of their arrival led to many paranoid, infected people to belief them to be the cause of it. This has led to riots in the streets as super mutants are hunted down and killed, forcing the surviving mutants to hide in the tunnels under the city.
The NCR hoped to capitalize on this situation, urging the City Council to use their OSI to find a cure for the disease. To the NCR's surprise, the City Council chose instead to ask for aid from the Mojave Federal Republic, who are allied with the Followers of the Apocalypse. The MFR responded in full, sending in their 3rd Motorized Infantry to aid in bringing order in the city and supplying the Followers as they set up a base in downtown. This has led to much anger in the NCR, especially in the Senate, and has strained the already weak relation between the two nations.
Most of the city's population now lives in Seattle's Downtown, former businesses turned into homes and skyscrapers turned into apartments. They are supplied power from a dam in the Cedar River and heat from the Seattle Steam Company. The outer ruins have created a pseudo-barrier protecting it from the outside. Many bridges were destroyed, buildings collapsed and blocked roads, and some of the land to the south sunk and flooded. The main ways now into the city are south through I-5, east from Mercer Island through I-90, or north from George Washington Bridge. Access from the sea is still possible, but uncommon, and has an assortment of dangers, especially mutant sea creatures.
A small labyrinth of former metro and maintenance tunnels. The "lower class" of Seattle live down here. While it is dark, dank and mutant creatures occasionally find a way in, it still provides shelter and even small communities for those that can't afford otherwise. Various leaks also have caused water from Lake Washington to pour in, forming a small lake for (somewhat) fresh water. Most entrances to the tunnels outside of Downtown were destroyed, with the few surviving entrances being used by smugglers and criminals.
Despite the name, the Suburbs to the north and south of the city are not for residential living. The former residential areas of Seattle have had many of their building removed, either by the War or by recent workers, and the land has been mostly converted into farms to supply the city. The Emerald Guard rarely patrols the Suburbs, but raiders fear entering as it may incur the Guard's wrath. Farming is quite profitable in Seattle, but working outside of Downtown is considered dangerous thanks to mutant creatures or rare bandit attacks. Those that dare to actually live in the Suburbs are considered brave and foolish.
The island is almost completely overrun by catfish mirelurks and considered unlivable. The Emerald Guard runs occasional raids on the island when the population becomes too large, but has failed to completely eliminate the threat there. The major use for the island is by traders, and recently the MFR, who use the still functional I-90 for travelling to or from the east or southeast.
Seattle controls a small region outside of the city. Ranging several miles south of the city, 30-40 miles east and an unknown number of miles north. They have made no attempts so far at controlling the area to the west of the city, past the Puget Sound. The main focus of the city in this outer region is on the Cedar River and its facilities and Lake Youngs and its surrounding area. Cedar River's main facilities are still mostly operational, providing power and, when combined with Lake Youngs, fresh water to Seattle.