Northwestern Indiana police say firefighters used boats to rescue 18 people after floodwaters from heavy overnight rains surrounded their homes.

Sgt. Larry LaFlower of the Porter County Sheriff's Department says rain-swollen Salt Creek trapped four families in their homes in the community of South Haven. He says firefighters used boats early Friday to rescue those residents and bring them to dry ground at a local fire station.

LaFlower says the flooded homes were in an older, flood-prone neighborhood in the community about 15 miles east of Gary.

He says several side streets in South Haven are flooded and there's significant flooding near South Haven Elementary School.