Dozens of people were taken to hospital with breathing problems today after a bungled delivery to the London 2012 Aquatics Centre sparked a ‘chemical reaction’ that led to deadly Chlorine gas being pumped out.

With people who inhaled the toxic substance in the carpark, more than 200 people were removed from the arena. 

29 individuals were taken to the hospital, where they kept it closed off for 5 hours. One patient was taken to hospital by a paramedic while many swimmers were still wearing their goggles and trunks. They were then wrapped up in foil blankets in order to stay warm. 

Almost 50 people needed care at the scene in east London, just yards from West Ham United’s world famous London Stadium.

London Fire Brigade stated that a high quantity of chlorine gas was released from the Aquatics Centre in Queen Elizabeth Olympic Park, London. This happened due to a chemical reaction. According to the Aquatics Centre, the incident occurred when the facility management company took possession of the pool chemicals.

Photographs from the scene show a blue car with several tanks of chloric acid left outside. It is not known what happened next, but for safety reasons, experts recommend that hydrochloric acid and pool chlorine should never be stored together – and should absolutely never, ever be mixed, under any circumstances – because they can cause the release of chlorine gas.

If inhaled, chlorine gas is a deadly substance that has even been used to weaponize war. You may also experience shortness of breathing, blurred vision and burning sensations in your nose, throat, and eyes.

London Ambulance Service stated that 29 individuals were transported to the hospital by London’s Queen Elizabeth Olympic Park.

Darren Farmer (London Ambulance Service’s gold commander) said that they responded this morning to a major incident in Stratford at the London Aquatic Centre. He was joined by colleagues from the Metropolitan Police and London Fire Brigade.

The significant amount of resources sent included 13 ambulance crews with advanced paramedics, 2 fast response car medics, 2 incident officers, 1 medical adviser, and 3 members of the hazardous area team (HART).

“We also sent medics to London from the Air Ambulance. We took in 29 patients and evaluated 48 others. Majority of the patients had minor breathing difficulties.

LAS stated that it had reacted shortly after 3pm. 

A lorry carrying a tank of hydrochloric acid, parked outside the Aquatics Centre at the Queen Elizabeth Olympic Park in London, following a gas-related incident

Following a gas-related incident in London, a truck carrying hydrochloric acids was left parked outside of the Aquatics Centre at Queen Elizabeth Olympic Park.

A person is treated by paramedics as emergency services evacuate the London Aquatics Centre at London's Olympic Park

Paramedics treat a person as the emergency services leave London Aquatics Centre, London’s Olympic Park.

22 ambulances and several fire engines at the London 2012 Aquatics Centre (right of picture) after people became ill after a release of Chlorine gas

22 ambulances and several fire engines at the London 2012 Aquatics Centre (right of picture) after people became ill after a release of Chlorine gas

After the release of chlorine gas from a chemical reaction, a major incident was declared in the capital 

A swimmer is taken away still wearing his goggles as deadly gas was released following a chemical reaction in London

After a London chemical reaction, deadly gas released in London caused a swimmer to be taken from the pool wearing only his swim goggles.

Swimmers, personal trainers and pool staff had to be evacuated from the building following the delivery error

After the delivery error, all swimmers, trainers and staff at the pool had to be evacuated.

Emergency vehicles are pictured outside the Queen Elizabeth Olympic Park

Pictured outside Queen Elizabeth Olympic Park are emergency vehicles

Ambulances arrive as emergency services evacuate people from the London Aquatics Centre on March 23, 2022

As emergency services evacuate the people at London Aquatics Centre, on March 23, 2022, ambulances arrived

Emergency services near the Aquatics Centre, at the Queen Elizabeth Olympic Park in London, following a gas-related incident at the London Aquatics Centre

After a gas-related incident at London Aquatics Centre, emergency services were called to the Queen Elizabeth Olympic Park, near the Aquatics Centre.

A team of firefighters make plans to enter the London 2012 Aquatics Centre, which is being ventilated due to the release of a deadly gas

An emergency response team plans to go into the London 2012 Aquatics Centre. The centre is currently being ventilated because of the deadly gas released.

There was a mass evacuation of buildings and building sites in the area as the emergency services declared a major incident

The emergency services reported a major incident that required the evacuation of large numbers of buildings.

Footage from the sky showed people being treated in the car park on coloured mats

Video footage from the air showed people using coloured mats in the parking lot.

The building, close to West Ham United's London Stadium (pictured right), has been evacuated and the Mayor of London has urged people to avoid the area

It is located near West Ham United’s London Stadium.

The gas released from chlorine that is used to kill bacteria in swimming pool pools can prove deadly.

This 17th element of the periodic Table is chlorine. It’s the base for many common household bleaches.

It’s also used in swimming pools. The acid reacts with water to create hypochlorous acids that kill bacteria and provides sanitary conditions.

However, it also has a dark past due to its use as a weapon of war. It first appeared in April 1915 during the First World War.

It was used by the Germans against the French, killing 100 people. The war went on and more gas attacks were launched by each side.

Although the Geneva Protocol in 1925 prohibited the use of chemical weaponry in war, they were used by Italy and Japan in the 1930s against Ethiopia and China.

Chemical warfare was rendered ineffective by the Second World War due to improved defences like gas masks and clothing, and detectors. However they were still used during the Yemeni Conflict of 1966-67 as well as the Iran-Iraq War 1980-88. However, they were used again as a weapon in the Syrian civil War. More than 80 people were killed by a chemical attack.

The Aquatics Centre was ventilated for most of the day and the Mayor of London has urged people to avoid the area. 

“Due to chemical reactions, a large quantity of chlorine gas were released. London Ambulance Service is treating many patients, according to a London Fire Brigade spokesperson.  

He said that around 200 people were evacuated. We ask residents to keep their doors and windows closed while we ventilate the area. 

After a toxic substance was leaked into the structure containing the diving and swimming areas, the London Ambulance Service was called to the Olympic Park in East London just before 10am. 

Some people described feeling dizzy and unable to breathe due to headaches. Some even fell on the asphalt, while others slept on their stomachs.

A spokesman for the Queen Elizabeth Olympic Park tweeted:  ‘There has been an incident @AquaticsCentre this morning involving the release of a gas. 

The area has been evacuated and is now being cordoned off. The emergency services are being assisted on the site. There are a number of casualties with breathing difficulties being treated by @Ldn_Ambulance’.

Photos from the scene show more than 20 ambulances outside the closed off building, and three fire trucks. The police were also present. Paramedics treated patients in the parking lot from footage taken by helicopter.

At 10:10, officers evacuated the swimming-pool and sealed off surrounding areas in Stratford East London. 

According to a spokesperson for Scotland Yard, the following was said by London Fire Brigade: “Officers were alerted Wednesday morning at 9.53am by London Fire Brigade about noxious fumes leaking from Queen Elizabeth Park’s Aquatics Centre.”

“Officers” and the London Ambulance Service were also on scene. Numerous people were evacuated.

Multiple resources were sent by the London Ambulance Service to respond to the emergency.

Twitter: A spokesperson said that they were responding to the Queen Elizabeth Olympic Park incident and had a variety of resources available.

The London Aquatics Centre - with its distinctive sloped roof - is a well known landmark in the Olympic Park

London Aquatics Centre, with its unique sloped roof and distinctive design is an iconic landmark of the Olympic Park.

British Olympic diver Tom Daley performs a dive into the dive pool of the Aquatics Centre, venue for the London 2012 Olympic Games. It has been evacuated today

British Olympic diver Tom Daley takes a dip in the Aquatics Centre dive pool. This is where the London 2012 Olympic Games will be held. Today, it was evacuated.

Photographs showed numerous police cars, ambulances and fire engines parking near ArcelorMittal Orbit’s 114-meter slide.

Sadiq Khan, the Mayor of London, advised Londoners to stay clear of this area as he worked with emergency service personnel.

On Twitter, he wrote: “I am in close contact to our emergency services who were dealing with the gas-related incident this morning at London Aquatics Centre.”

@LdnAmbulance is treating a number of patients. The area has been evacuated and cordoned off.