NAPERVILLE, Ill. (WLS) — There is a large-scale search Monday for a missing woman in Naperville.

The Forest Preserve District of DuPage County said on social media they are helping Naperville police in the search, which began at 9 a.m. at Springbrook Prairie Forest Preserve on 83rd Street.

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Olasinmibo “Sinmi” Abosede was last seen on Wednesday.

Dozens are volunteers are helping, along with K-9 teams.

Illinois State Police previously said Abosede is 46; 5-feet, 6-inches tall; and weighs 190 pounds.

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She has black hair and was wearing a black head scarf, black Adidas jacket with white stripes on the sleeves, gray sweatpants and black Crocs, state police said.

She was last seen on the corner of Sudbury Street and Lindsay drive at 9:20 a.m. Wednesday.

Abosede has a condition that places her in danger, police said.

People who plan to visit that forest preserve Monday will notice increased activity, but the preserve and parking lots are open.

Chopper 7 was over the scene about noon, and one of the people searching was put on a stretcher and placed in an ambulance.

It was not immediately clear what happened to the individual.

Those searching are wearing bright colors and combing through the brush in the area.

Anyone with information on Abosede’s whereabouts is asked to call 911 or the Naperville Police Investigations Division at 630-548-1421.

This is a developing story; check back with ABC7 Chicago for updates.