There are more than 275 mayoral races on the ballot around the country today, ranging from the Jersey Shore’s Point Pleasant Beach (population 4,828) to big cities like Houston and Philadelphia. I’ll be closely tracking the results in those two cities, but will also keep an eye throughout the night on local news for surprising outcomes in lower-profile races.

Former Philadelphia City Council member Cherelle Parker is highly favored to replace Mayor Jim Kenney, who is term-limited, after winning an expensive Democratic primary in May. Another former City Council member, David Oh, won the Republican nomination uncontested. A Republican victory would be a shocker here — we don’t have any public polling of the general election, but about three in four Philadelphia voters are registered Democrats, and the city hasn’t had a Republican mayor since 1952. However, Oh has won over Democratic voters before, so it’s a race worth watching. Parker too is a moderate within her party, and made news when she beat out progressive primary opponents with a tough-on-crime platform including support for controversial stop-and-frisk policing tactics. Both candidates would make history with a win: Oh would be the first Asian American ever to serve as mayor of Philadelphia, and remarkably, Philadelphia has never elected a female mayor, so Parker is likely to be the first.

In Houston, the mayor’s race is more competitive, but tonight is likely just the first half of a two-part series. If no candidate receives 50 percent of the vote, the top two performers progress to a runoff election, which will be held on Dec. 9. And with 18 names on the ballot today, it’s going to be tough for any individual candidate to coalesce half of the vote. This race is technically a nonpartisan election, but the top two candidates are longtime Democratic state Sen. John Whitmire and longtime Democratic U.S. Rep. Sheila Jackson Lee. Whitmire is by far the top spender in the field. The only public poll we’ve seen so far — conducted by the University of Houston Sept. 30-Oct. 6 — also found Whitmire leading the race with 34 percent of likely voters, followed by Lee at 31 percent. Although they’re both Democrats, Whitmire, who has framed his candidacy around working across the political spectrum, received more support from Republicans and independents in the University of Houston poll. Lee received more votes from Democrats, women and Black voters. In a hypothetical head-to-head matchup, Whitmire led 50 percent to 36 percent.

—Leah Askarinam, 538

Polls are closed in the eastern half of Kentucky and very early results are starting to trickle in. Be aware of a possible blue mirage and a possible red shift later: the early votes, which tend to favor Democrats, are counted first.

—Monica Potts, 538

Key election races across US with implications for 2024:

They’re not the sexiest things on the ballot, but one congressional and seven state-legislative special elections are also taking place today. The highest-profile one is the special election between Democrat Gabe Amo and Republican Gerry Leonard Jr. to fill former Rep. David Cicilline’s seat in the U.S. House. There isn’t much suspense about who will win, though: That seat — Rhode Island’s 1st District — is safely Democratic. As a result, Amo, who is Black, will almost certainly become the first person of color to represent Rhode Island in Congress.

However, it’ll still be worth paying attention to the final margin in that race and the other special elections. As we’ve written in the past, when one party consistently outperforms its usual margins in special elections, it has historically boded well for the party in the subsequent general election. And so far in 2023, Democrats have been winning special elections by significantly more than the partisan baselines of those districts would predict. I’ll be watching to see if that pattern continues tonight.

—Nathaniel Rakich, 538

In Mississippi's gubernatorial contest, Reeves leads by about 15 points, 57 percent to 42 percent, with 34 percent of the expected vote reporting. However, one of the most critical counties in the state will probably be late to report its vote. Hinds County, home to the state capital of Jackson and Democrats' biggest voter base, had ballot shortages, which led a state court to order that all precincts remain open another hour beyond the 8 p.m. Eastern poll closing time, and a handful of others until 9 p.m. The Mississippi Republican Party filed an emergency motion with the state supreme court to vacate the lower court's ruling regarding extended poll times. Hinds County's population is almost three-quarters Black.

—Geoffrey Skelley, 538