WATCH: ‘It looked like a volcano erupted’ says firefighter battling Helderberg blaze

Firefighters have been battling the blaze on the Helderberg mountain since Wednesday afternoon, and with some rain forecasted for this week they are hopeful it will bring the fire under control.

Ronaldo Duncan, firefighter at Sir Lowry's Pass Fire Station, recalls how strong overnight winds on Friday fanned the flames.

“For a minute it looked like a volcano erupted. The whole side of the mountain was ablaze,” he said.