Election night in Florida saw close races in some of the biggest races this year. Tallahassee mayor and Democratic nominee Andrew Gillum conceded the governor's race to Republican Ron DeSantis. Unofficial results showed Republican Rick Scott narrowly ahead of Democrat Bill Nelson in the race for Senate.

Even the race for Ag Commissioner is expecting a recount and locally, a race for a Tallahassee City Commission seat appears too close to call.

So could these 2018 races go to a recount? Here's what state laws say:

Ron DeSantis by less than a percent

Florida state law requires the Secretary of State to order a mandatory machine recount if the first set of unofficial returns show a candidate losing by 0.5 percent or less. The county supervisors of elections recalibrate their machines and run the ballots through.

If those second unofficial results show a candidate losing by .25 percent or less then a manual recount must be conducted of the overvotes and undervotes set aside from the machine recount.

In Gillum's case, the numbers Thurday evening showed a margin of about 38,000 votes, below the 0.5 percent needed for a recount.

(NOTE: These numbers are being updated frequently today. We'll do our best to update them.).

Nelson's campaign says his race is headed to a recount Tuesday. Unofficial numbers showed a difference of 17,344 votes between the Senator and challenger Scott. That's less than a one-half percentage point.

For Nelson, the next step in this process is for county supervisors of elections recheck their vote tally and for the campaign to contact voters whose ballots weren't counted due to lack of ID or a matching address by noon Saturday.

Canvassing boards must turn in their first set of unofficial results to the Division of Elections by noon Saturday. Once the preliminary results are in, the Secretary of State will announce any races that require mandatory recounts.

It's close. Real close:A closer look at the how close the too-close-to-call Florida Senate race

Florida governor race:Why Andrew Gillum's loss to Ron DeSantis is historic

More:Possible Senate recount would be overseen by Rick Scott appointee, former Democrat

Ballots counted after Election night

Both provisional and absentee votes from overseas are counted after Election Day. Provisional ballots are required by federal law and are used when there is uncertainty about a voter's identity. These ballots are investigated by the board of elections.

Only a handful of counties have finished counting provisional ballots and overseas absentee ballots can continue to be counted until 10 days after the election.

Is Andrew Gillum's concession legally binding?

Gillum conceded his race in a tearful speech Tuesday, but Nelson did not. In 2000, Al Gore conceded to George W. Bush, but it didn't halt the automatic recount when the margin was .03 percent.

The speeches are not legally binding and are simply a courtesy gesture to respecting the vote and democratic process.

Nate Chute is a producer with the USA Today Network. Follow him on Twitter at @nchute.

From red to recount?