SAN DIEGO (FOX 5/KUSI) — Voting is officially underway in the runoff special election for the vacant District 1 seat on the San Diego County Board of Supervisors.

The Registrar of Voters mailed ballots to all registered voters in the South County district on Monday, giving residents just shy of a month to cast a vote in the race between Chula Vista Mayor John McCann and Imperial Beach Mayor Paloma Aguirre.

Completed ballots can either be returned through the U.S. Postal Service or by placing them in one of the more the two dozen drop boxes set to open up in the lead up to race day.

To keep tabs on the ballot as it makes its way to the registrar for tabulation, voters can sign up for the county’s “Where’s My Ballot?” tool.

D1 Special Election: What to know | The Candidates | How to vote

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