‘Two countries’ would survive if nuclear war that could kill ‘five billion in days’ began

With the repercussions of the US-Israel strikes on Iran continuing to be felt, many people's minds are turning to the worst-case scenario of nuclear war and what, if anything, would survive in the aftermath.

Following the US-Israeli strikes on Iran on Friday (28 February), which killed Supreme Leader Ayatollah Ali Khamenei, Iran has launched retaliatory strikes on US military facilities across the Middle East.

Saudi Arabia, UAE, Qatar, Bahrain, Kuwait, Oman and Jordan have all reported missile or drone strikes believed to be from Iran.

Meanwhile, Israel continues to attack Iran, also firing missiles at Lebanon and promising troops on the ground to 'advance and seize additional strategic areas in Lebanon in order to prevent fire on Israeli border communities'.

Both Russia and China have interests in the region, with Russia relying on Iranian drones and China on Iranian oil.

The US' strikes on Iran over the weekend has sparked global conflict fears (ATTA KENARE / AFP via Getty Images)

Meanwhile, Iran's proxy militias - Hezbollah in Lebanon, the Houthi movement in Yemen, and Shia militias across Iraq and Syria - could also be drawn into the conflict.

We don't know what will happen next, only that more people are going to die and the possibility of further escalation is on the table, and the final, most catastrophic option looms over all.

Nuclear war that wipes out the planet is unlikely to happen soon, as nuclear-armed powers aren't at war with each other, but just in case that changes, bestselling author Annie Jacobsen, who penned the cheery-sounding book Nuclear War: A Scenario, has said only two countries would survive, New Zealand and Australia.

New Zealand and Australia are said to be the only 'two countries' that would survive (Getty Stock Images)

Speaking on The Diary Of A CEO podcast, Jacobsen painted a grim picture of what a global nuclear war would do, as she said around five billion people would be dead within the first 72 minutes.

What would actually happen to the Earth if nuclear war broke out?

With most of the Earth's population dead and the land scorched in nuclear fire, Jacobsen said one of the consequences would actually be a mini-ice age.

"Most of the world, certainly the mid-latitudes, would be covered in sheets of ice... places like Iowa and Ukraine would be just snow for 10 years.

"Agriculture would fail, and when agriculture fails, people just die.

"On top of that, you have the radiation poisoning because the ozone layer will be so damaged and destroyed that you couldn't be outside in the sunlight – people will be forced to live underground."

She worked with climate expert Professor Brian Toon, who told her only two countries in the world would be able to 'sustain agriculture', so if you wanted to head to Australia or New Zealand, that'd be the place to go.

Putin's ongoing war with Ukraine has also sparked concern of escalation (Jung Yeon-je / AFP via Getty Images)

Which countries would be safe in the event of a world war?

Everyone thinks about where not to be for the bombs, but there's all the living afterwards to come, assuming you want to make it through that.

That's also assuming nobody lobs a nuke or 10 in their direction; they are geographically out of the way and might be able to avoid an exchange of nuclear weapons.

They're also without nuclear weapons themselves, so you'd hope nobody's going to be firing on them to try and stop them from launching.

(LADbible)

Other countries considered safer in the event of a catastrophic global conflict include the likes of:

• Iceland
• Switzerland
• Tuvalu
• South Africa
• Chile

Basically, you want somewhere out of the way of the countries that do have nuclear weapons, but it comes back to the point that you'll need somewhere that can still sustain agriculture for afterwards, otherwise all the survivors will starve.