Firefighters executed back-burns in the area of Mierkom near Wortelgat last week to confine flare-ups to a planned block and prevent them from spreading to surrounding areas.
The flare-up occurred two days after the fire was contained, and was first noted at approximately 11:30 on Tuesday 15 March. Officials of Overstrand Fire and Rescue Services and Cape Nature, who had been on the scene since the fire first broke out on Friday 11 March, immediately responded and requested aerial resources to contain the flames.
Overstrand Municipal Manager Dean O’Neill reported the fire was burning in dense rooikrans bushes, where access is limited, making it difficult for firefighters to get close to the flames. Invasive aliens such as rooikrans make fires burn hotter and spread faster. The hot spots from these fires in rooikrans bushes also remain smouldering for longer and are prone to flare ups.
Overstrand Fire Services and Cape Nature consulted with affected landowners and it was agreed to conduct back-burn operations to contain the flare-up to an area that had been agreed on and prevent the fire from spreading. Back burns or block burns are conducted by setting alight bushes and/or flammable material along the perimeters of a large block of land to contain an active fire raging inside the block.
The aim of the back burn is to remove any material that could act as fuel for the approaching fire. Once the active fire reaches the area where the back burn was conducted, it will have no fuel to spread and it will die down.
As result of the back burn, large smoke clouds could be seen kilometres away.
Overstrand Municipality, however, gave the assurance that there was no threat to any properties.
“There are still large pockets (‘patches’) of unburnt material within the block that might flare-up and burn fiercely,” said O’Neill.
“These flare-ups do not pose a threat to any properties, including those in De Kelders and Voëlklip where most of the calls from concerned residents emanate.”
Windy conditions hampered firefighting efforts and continuous flare-ups on the perimeter of the fire-line proved to be a real challenge, causing firefighters to deal with the various spot fires.
On Friday (18 March), 54 firefighters were at the scene to contain any flare-ups that could arise and to do mop-up operations along the perimeters of the back-burn.
Overstrand Fire Services, CapeNature, Greater Overberg Fire Protection Association (goFPA) and Working on Fire (WoF) were set to remain on scene 24/7 until at least Monday 21 March.
Firefighters expressed their appreciation to the public for donations.