Tuesday marks the special primary election for a seat in the State Senate.
Voters will eventually replace Juan Vargas, who resigned from District 40 after winning a seat in the U.S. House.
Hector Raul Gastelum, Xanthi Gionis, Anna Nevenic and Ben Hueso are on the ballot.
This election includes voters in parts or all of Blythe, Cathedral City, Coachella, Indio, Mecca and Thousand Palms.
Nearly 45,000 vote-by-mail ballots have been issued in Riverside County. More than 9,500 — or 21.5 percent of those — have been returned, the Registrar of Voters said Monday.
Voters will be able to cast ballots at 21 polling places.
To find your assigned polling place, visit the Registrar of Voters office website at or call (951) 486-7200.
Polls are open from 7 a.m. through 8 p.m. Tuesday.