Emergency services were called to Klarwein Close in Gordonvale, south of Cairns, at about 11am yesterday when high-volume rain triggered flash floods.
Police rescued a 94-year-old man and a 64-year-old man and took them to safety.
Several other people were evacuated from the area.
Chief Superintendent Kevin Fitzgibbon warned locals not to become complacent.
“While we’ve seen a slight reprieve in the wet weather today, we are expecting further rainfall later this week,” Fitzgibbon said.
“We have plans in place and are moving resources accordingly, but now is the time to prepare your home and family in the event of flash flooding.
People are urged to save the Emergency Alert number, +61 444 444 444, in their phone, and to follow advice from emergency services.