Daily Bulletin

News

  • Written by Sahani Hendawitharana, PhD Scholar, Queensland University of Technology

Recent bushfires mercilessly destroyed almost one-third of Kangaroo Island, razing many homes to the ground.

Seeing this destruction on a recent visit to Kangaroo Island made us rethink how we could improve people’s safety. We spoke to people affected by the fires and learnt most preferred to stay and protect their properties, rather than evacuate. Here are some of their responses:

I’ll only leave my house if I see danger ahead.

When the fires started to come towards us, my husband wanted to evacuate early, but I wanted to spend the night in my home. The fires were far away and they didn’t reach us anyway.

He had $10,000 worth of hay he wanted to protect from the fires. But even with the help of fire services, we couldn’t save them.

People should always evacuate early to ensure their safety. But when they do decide to stay or they’re told it’s too late to leave, having a plan B is extremely important. Fire crews may struggle to reach you in time if anything goes wrong.

This is why having the option of a bushfire-safe room could be the last trump in your hand to save your life.

Read more: How to prepare your home for a bushfire – and when to leave

Safe rooms are a purpose-built, last-resort option to shelter from a bushfire attack. They should be built with fire-resistant material such as stone and bricks, be situated in or near a person’s home, and be resistant to toxic gas and smoke. This is a difficult task, so we’re researching how to make bushfire-safe rooms as safe as possible.

A growing number of people are turning to bushfire bunkers but are they lifesavers or deathtraps? Video: The Project

Why might you need a bushfire-safe room?

Imagine if:

  • you have no clue of the fire direction or the speed

  • your access road to escape is on fire

  • you wanted to escape before the fire comes, but can’t

  • you planned to stay and defend, but that seems impossible

  • emergency services cannot reach you in time.

On Kangaroo Island, for instance, long straight roads are the sole way in and out of some remote and rural settings. Often there’s no mobile coverage, some parts of the island have no beach for people to escape to and emergency services may take a long time to arrive.

When fire is approaching, it’s common for people to flee to nearby brick buildings, such as schools, to seek shelter.

Read more: Building standards give us false hope. There's no such thing as a fireproof house

But these buildings aren’t purpose-built for bushfire protection. And while they might be the safest option when there’s nowhere else to go, they are still risky. Smoke can penetrate, and burning embers can enter gaps in the building.

How safe are safe rooms?

Bushfire-safe rooms also have inherent risks. If they’re not constructed properly, they can be deadly.

Unlike other safe rooms used around the world (tornado shelters, war bunkers or bullet proof safe rooms), bushfire-safe rooms must be able to handle increased inside temperatures, carbon dioxide accumulation and smoke penetration, as well as withstand extremely high temperatures. They also need sufficient space for multiple people, and possibly space to store food supplies and valuables.

When there's nowhere to escape, a bushfire-safe room could be your last resort When the road to escape is surrounded by fire, where can you turn? AAP Image/David Mariuz

After Black Saturday, The Australian Building Codes Board released performance standards for the construction of private bushfire shelters. But these standards aren’t mandatory, and there’s room for improvement.

For example, the standards specify that an able-bodied person should stay in a private bushfire shelter for only one hour – the time it takes to withstand a fire front and any adjacent fires, and leaving a 10-minute safety margin before and after they hit.

But as bushfire severity and smoke conditions vary, people could, realistically, be stuck in there for a few hours.

This is why engineering safe rooms correctly and thoroughly is critical before the next bushfire disaster hits. This is where our research at Queensland University of Technology comes in.

Researching safety

We’re researching how to best construct bushfire-safe rooms from a structural engineering point of view, testing bushfire-resistant building materials, wall systems, and more. We’ll have results to share in six to eight months.

Interestingly, we’re also testing materials such as pumice (lightweight volcanic rock used in chimneys) and refractory blocks (ceramic material used to line kilns and furnaces), with promising results.

Safe rooms can be situated underground or above-ground at surface level, and we found both options have pros and cons. Above-ground structures would endure significant exposure to flames, while maintenance and accessibility for people with disabilities are problems for underground safe rooms.

Read more: Where to take refuge in your home during a bushfire

Still, Australia needs more scientific research beyond ours into the integrity of bushfire-safe rooms. We also need more behavioural studies to track how people respond to fires so we can better protect them with other survival options.

It’s high time people in bushfire-prone areas were given realistic ways to survive when evacuation is no longer an option.

Authors: Sahani Hendawitharana, PhD Scholar, Queensland University of Technology

Read more https://theconversation.com/when-theres-nowhere-to-escape-a-bushfire-safe-room-could-be-your-last-resort-132191

Writers Wanted

The ebb and flow of COVID-19 vaccine support: what social media tells us about Australians and the jab

arrow_forward

Cyclone Seroja just demolished parts of WA – and our warming world will bring more of the same

arrow_forward

New Zealand’s new housing policy is really just a new tax package — and it’s a shambles

arrow_forward

The Conversation
INTERWEBS DIGITAL AGENCY

Politics

Prime Minister Scott Morrison delivered Keynote Address at AFR Business Summit

Well, thank you all for the opportunity to come and be with you here today. Can I also acknowledge the Gadigal people, the Eora Nation, the elders past and present and future. Can I also acknowled...

Scott Morrison - avatar Scott Morrison

Morrison Government commits record $9B to social security safety net

The Morrison Government is enhancing our social security safety net by increasing support for unemployed Australians while strengthening their obligations to search for work.   From March the ...

Scott Morrison - avatar Scott Morrison

Ray Hadley's interview with Scott Morrison

RAY HADLEY: Prime Minister, good morning.    PRIME MINISTER: G’day Ray.   HADLEY: I was just referring to this story from the Courier Mail, which you’ve probably caught up with today about t...

Ray Hadley & Scott Morrison - avatar Ray Hadley & Scott Morrison

Business News

Step by Step Moving Guide for Moving an Office

Compromising office hours, carrying bulk equipment, moving sensitive files — office relocation is no cakewalk. There is so much to do when you want to relocate your office. Aside from the major tas...

News Co - avatar News Co

5 Effective Employee Retention Strategies You Can Apply to Your Organization

Your employees are the lifeblood of your organization. No matter how great you think your company is, without the right talents to keep your business up and running, all your efforts to rise above...

News Co Media - avatar News Co Media

5 Reasons Why Organizational Culture is Crucial to Your Business

You have probably heard a lot about organizational culture and companies finding ways to create a positive culture in the workplace, but not so much about the reasons why it even matters to busine...

News Co Media - avatar News Co Media