Seattle Mayor Ed Murray says his office estimates about 300,000 fans coming to celebrate with the team as it parades down Fourth Avenue. The parade will start at 11 a.m. and go from Denny Way to CenturyLink Field.
Due to the high demand, Mariners officials announced they would open up Safeco Field for fans to watch the parade on the stadium's video board. By Tuesday night, team officials announced that all tickets for that event had been claimed.
Murray activated the city's emergency operations center as part of an elaborate security plan that will include hundreds of law enforcement officers and cost several hundred thousand dollars.
While the sun will be shining, the forecast calls for temperatures in the low 30s.
The parade will feature Seahawks players, coaches, Sea Gals, Blitz and the blue Thunder drum line. Players and coaches will be in Ride The Duck vehicles and open-roof military Humvees.
On Tuesday, Seattle schools officials said they will leave it up to school principals to excuse absences from students attending the parade.
Seattle Preparatory is one of several Catholic schools that have cancelled classes so teachers and students can attend the parade.
"Well, we weren't going to be productive anyways, so why not leave?" said student Mark Harris.
Some businesses along the parade route will close so workers can enjoy the festivities.
"Oh no, no, no, no, we shut the salon down and we are having a big celebration. This is off the hook," said Lisa Noji, who owns a local salon.
King County Metro will add 50 Seattle buses to help transport parade goers in and out of town after the big event.