The prospect of sea-level rise flooding huge swathes of Long Beach doesn’t exactly sound like occasion for a festival.

But that looming possibility is at the heart of the LB ClimateFest at Marine Stadium on Saturday.

The city-sponsored event will have food, music and games. And it will have maps and other details of dire projections, such as how Naples, the Peninsula and Belmont Shore would all suffer major inundation if a 100-year storm surge hits in 2030 or later.

King tides would flood those neighborhoods by 2050, according information use to prepare the city’s draft Climate Action + Adaptation Plan — also known as CAAP. That draft, to be unveiled at Saturday’s event, also examines the repercussions of increased temperatures throughout the city.

The city is planning LB ClimateFest to attract families, and it will include interactive activities on dealing with climate change. As a famous nanny once sang, a spoonful of sugar helps the medicine go down.

“Climate change is a serious threat to our planet and our city,” Long Beach Mayor Robert Garcia said. “It’s important for the community to get involved in this critical process, and LB ClimateFest presents a milestone opportunity for us to come together to create an effective and successful CAAP.”

In addition to informing residents about the projected effects of sea-level rise and climate change on their neighborhoods, the city is gathering feedback on proposed responses in an effort to engage the public and build consensus. Saturday’s ClimateFest is the latest in a series of public presentations on the CAAP process.

Projections used by the city and state show the region’s sea levels rising by 11 inches in 2030, 24 inches in 2050 and between 37 and 66 inches by 2100. But Jerry Schubel, a marine scientist and CEO of the Aquarium of the Pacific, told residents at a January CAAP workshop that projections have been steadily increasing and the rise by the end of the century could be 7 feet to 10 feet.

Suggestions on how to deal with the rising ocean include building a seawall around all of Naples, putting homes on stilts and making a “managed retreat” by moving away from ocean’s encroachment on the coast.

“Retreat is going to be the strategy in the United States and in the world,” Schubel predicted at the January workshop. “We all look for silver bullets — simple solutions — and there are none. You can stand and fight, but only for so long.”

Saturday’s LB ClimateFest will last from 10 a.m. to 1 p.m. at 5255 E. Paoli Way. Reservations are requested but not required. For more information on CAAP and to make reservations, visit lbds.info/climateactionlb/