SEATTLE — Fireworks are set to light up the sky above Lake Union on Saturday night as Seattle marks America’s 250th birthday on the Fourth of July.

Crews are preparing more than 7,000 pounds of fireworks for the Seafair show over the water, with hundreds of thousands of spectators expected at Gas Works and Lake Union parks.

This year’s festivities come as visitors from around the globe are in Seattle ahead of another World Cup match featuring Team USA on Monday.

One major change for this year’s celebration is that Gas Works Park will be gated off and will require tickets for entry. Seafair organizers say the new system is intended to help manage the expected increased capacity and keep spectators safe.

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Planned activities during the day on Saturday include an interactive Seafair coloring wall and all-American games, where people can compete in a pie-eating contest, sack races, and a water balloon toss. Musical performances are scheduled to start at 5 p.m.

Free parking is available in the surrounding Gas Works Park neighborhood, but finding a spot is expected to be difficult. Organizers are urging people to give themselves extra time and consider rideshare, carpooling, or public transportation.

Fireworks sales and setting off fireworks are illegal in many areas of western Washington, making large public shows a safer option for many people.

Spectators at Gas Works Park will notice some changes this year. The city recently removed ladders, catwalks, and platforms from the structures there after the death of a 14-year-old last summer.

The teen’s family said the city failed to address dangerous conditions around the park’s towers despite years of warnings and several injuries.

The Lake Union fireworks are expected to start at roughly 10:15 p.m. Saturday.

Quentin Mosby apparently has decided he’s better off playing his high school basketball on the shores of the Gulf Coast rather than just up the street from Lake Washington.

At IMG Academy, rather than the Lakeside School.

In South Florida, rather than North Seattle.

On Thursday, multiple basketball websites reported the 6-foot-2 Mosby, after two years at academic-minded Lakeside, will transfer and play his final two seasons at sports-centric IMG in the coastal community of Bradenton.

It appears Mosby simply needed a step up in basketball competition after averaging 30.4 points per game for Lakeside as a sophomore and continuing his high-scoring ways with Seattle Select on the Under Armour All-Star circuit this summer at a 24.5 clip.

The forseeable drawback to this arrangement is the University of Washington basketball program, which made him a scholarship offer last month, will now have to conduct a long-distance courtship of this savvy player rather than just head to a local gym.

Mosby is clearly a mature player with the ball in his hands, able to go to the hoop with authority as well drain 3-pointers from around the perimeter.

Yet he largely was a one-man show at a school that counts its most famous alums as Microsoft founders Bill Gates and Paul Allen, Batman actor Adam West, McCaw Cellular founder Craig McCaw, Washington Governor Booth Gardner, Space Needle owner David Skinner and Arizona Diamondbacks outfielder Corbin Carroll.

Typical of his dominance in the 3A Metro League, Mosby came up with a 40-point, 10-assist performance in Lakeside’s 83-77 overtime victory over Franklin this past January. 

His father Dre Mosby reportedly played for Spokane’s John Rogers High School and led the Greater Spokane League in scoring at 20-plus points per game in 1997 after moving with family members from Southern California. He’s now a Seattle gym owner and a fitness trainer.