Updated / Saturday, 15 Mar 2025 21:36

The Chicago river has been dyed green for St Patrick’s Day.

Thousands of people flocked to downtown Chicago to witness the river turned green in keeping with a tradition that started back in 1962.

Since 1962, the Chicago Journeymen Plumbers Local Union 130 has been pouring 40 pounds of dye into a stretch of the river to help it turn a vibrant green colour.

The union says the dye they use is an orange-red vegetable-based powder that is non-toxic and safe for wildlife.

Watch the video to see the spectacle.