World War 3 warning: What would happen if North Korea’s hydrogen bomb hit New York?

Kim Jong-un tested the regime’s sixth and largest-ever nuclear test blast deep inside a mountain on September 3.

The hydrogen bomb test caused earthquakes of 5.6 and 6.1 magnitude that were felt in South Korea and Japan – and experts suggest the explosion could have yielded the energy of at least 150 kilotons worth of TNT.

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And in response, Donald Trump gave a hardline speech to the United Nations in New York this week – warning he would “totally destroy” North Korea if threatened.

Pyongyang branded UN sanctions “hostile” as tensions continue to escalate with both Kim Jong-un and Mr Trump trading threats. 

A furious Kim Jong-un said in a statement: “I will surely and definitely tame the mentally deranged US dotard with fire.” 

The statement sparked anger from Mr Trump who warned: “Kim Jong-un of North Korea, who is obviously a madman who doesn’t mind starving or killing his people, will be tested like never before.”

Now Express.co.uk reveals exactly what would happen if North Korea dropped a hydrogen bomb on New York – and how many people would be killed in the deadly blast.

According to Nukemap, if a 150kt h-bomb was dropped right on top of New York City Hall, it would create a fireball with a radius of around 1.09 square kilometres.

The Supreme Court would go up in flames, along with the city’s public library and the Lower Manhattan Hospital.

The core of a nuclear bomb can reach 150million Fahrenheit (66million Celsius) many times hot enough to vaporise rock, metal, and humans to nothingness.

And Nukemap estimates the blast would cause 385,660 deaths and 632,540 injuries.

A 20psi blast radios will spread to a 4.2km squared around City Hall, encompasses the financial district and its charging bull statue, the 9/11 museum and memorial, the One World observatory tower and around a third of the Brooklyn Bridge.

The website suggested this type of attack would see “heavily built concrete buildings severely damaged or demolished” in the explosion.

While a 5psi air blast, where “most residential buildings collapse” would cover 18.6 square kilometres – destroying huge swathes of Brooklyn and encroaching into midtown Manhattan and even parts of the east of New Jersey.

Those living or working within 11.8 square kilometres of the strike – within lower New York and the financial district are expected to see a 50 to 90 per cent mortality rate thanks to radiation – with death taking “between several hours and several weeks”.

And neighbourhoods including the East Village, Two Bridges, Greenwich Village and Stuyvesant Town would be instantly levelled – to remain uninhabitable for decades.

Thermal radiation causing third-degree burns would spread up to 68.4 square kilometres from impact point, leaving those around monuments such as the Statue of Liberty and Ellis Island with horrific injuries.

Nukemap says: “Third degree burns extend throughout the layers of skin, and are often painless because they destroy the pain nerves.

“They can cause severe scarring or disablement, and can require amputation.”

If the hydrogen bomb was dropped a little more north in the city, such as on Trump Tower near Central Park, the financial district would survive much of the initial impact.

But the city’s biggest landmarks – such as the Rockefeller Centre, the Chrysler Building, the Empire State building, Broadway and the United Nations headquarters would all come within the bomb’s radiation radius.

The entirety of Central Park would be destroyed by the massive fireball, and in this instance Nukemap estimates the blast would cause a whopping 792,630 deaths and 711,150 injuries.

Finally there’s the fallout.

The spread of nuclear fallout is irregular because it depends on the direction of the wind, but it can be carried over hundreds of miles.

According to the The National Academies and the US Department of Homeland Security, fallout is worst at the explosion’s epicentre, but deadly levels of radiation can be observed from miles away.

When the Chernobyl nuclear power plant in Ukraine suffered a meltdown in 1986, Increased levels of radiation were noted as far as Wales – over 2,300 km (1,400 miles) away.

In terms of a New York strike, the estimated levels of radiation fallout, on a 15mph wind, could be anywhere between 23.3km and 6,480km squared – based on fallout contour being between 1,000 rads per hour and one per hour.

If a nuclear bomb were to strike City Hall, the fall out would affect most of the United States – reaching as far as Dallas, Kansas City, Chicago – along with major cities such as New York and Toronto.

But North Korea’s bomb is expected to be more powerful than the Chernobyl explosion – meaning a strike could even effect as far as San Francisco and Los Angeles on the west coast, as well as Mexico, the Caribbean and even parts of the north of South America such as Venezuela.

While the estimate levels of radiation fallout, on a 15mph wind, could be anywhere between 23.3km and 6,480km squared – based on fallout contour being between 1,000 rads per hour and one per hour.