Tuesday’s elections will place at least two newcomers on the Denver City Council, as finalists vie for open seats in west and northwest Denver.

But the change could be even greater: incumbent council members Albus Brooks, Wayne New and Mary Beth Susman were forced into runoffs in their districts.

Altogether, it’s the broadest threat to incumbent council members in years, and the races are running hottest in areas seeing the most redevelopment. Here’s what you need to know.

Denver Council District 1
Denver council runoff: In District 1, two fire employees want to replace Rafael Espinoza

Denver Council District 3
Denver council runoff: In District 3, gentrification enters Latino neighborhoods

Denver Council District 5
Denver council runoff: In District 5, challenger says East Denver is nearing capacity

Denver Council District 9
Denver council runoff: In District 9, candidates debate role of community, developers

Denver Council District 10
Denver council runoff: In District 10, Capitol Hill and Cherry Creek voters clash over Denver density