UK sizzles on hottest day ever at 40C
London, July 19: The UK broke an unwelcome record on Tuesday when Heathrow in south-west London recorded 40.2 degrees Celsius on the hottest day ever experienced in the country.
The reading came soon after Surrey in south-east England had broken the record of the highest temperature ever since records began at 39 degrees Celsius. The previous record high temperature was 38.7C, set in 2019 at Cambridge Botanic Garden in eastern England.
The Meteorological (Met) Office said the readings are provisional as the temperatures are expected to soar even further with other regions reporting their readings at different times of the day.
The country was braced for unprecedented temperatures on Tuesday after the ongoing heat wave resulted in the hottest night on record at 26 degrees Celsius in parts of London overnight on Monday.
The Met Office red warning of danger to life from extreme heat remains in place for much of central, northern, and south-east England, including the capital city. At least five people are believed to have drowned after attempting to escape the heat in rivers and lakes.
Tuesday will be a pretty unprecedented day, with the mercury possibly reaching highs of 41C in spots in England. This will make it the hottest day on record and the first time we have seen temperatures as high as 40C," said Rachel Ayers, a Met Office forecaster.
There are likely to be delays on roads, with road closures, as well as possible delays and cancellations to trains and maybe issues with air travel. This could pose a significant health risk to those stuck on services or roads during the heat, she said.
A high of 38.1C was reached in Suffolk, eastern England, on Monday, just short of the UK record of 38.7C set in 2019. Scotland and Wales are also forecast to see their hottest days on record after a scorching Monday, when the latter set a new high temperature mark at 37.1C.
Network Rail issued a "do not travel" warning for Tuesday, affecting services travelling through the "red zone" under the Met Office warning map. Transport Secretary Grant Shapps said the UK's rail network could not cope with the extreme heat, adding that it would take "many years" before upgrades would mean services could handle the hotter climate.
"The simple answer is no, the network cannot cope with the heat right now," he told the BBC.
"In 40C heat, tracks can reach 50C, 60C, and even 70C, and there's a severe danger of tracks buckling and a terrible derailing. We are building new specifications, creating overhead lines that can withstand higher temperatures. But with the best will in the world, this is infrastructure which has taken decades to build, with some of our railways stretching back 200 years," he said.
The country's infrastructure structured around cold temperatures has struggled to cope with the extreme heat since the weekend. Runways at Luton Airport and Royal Air Force (RAF) Brize Norton were also impacted by the heat on Monday, forcing aircraft to divert.
There have been warnings of pressure on hospitals and ambulance services as temperatures are set to peak on Tuesday. Monday saw a number of schools close ahead of a scheduled annual summer break.
Water companies in southern and eastern England have warned increased demand is leading to low pressure, and even interrupted supply, for some households.
According to experts, heatwaves are becoming more likely and more extreme because of human-induced climate change. The world has already warmed by about 1.1C since the industrial era began, and temperatures are set to keep rising unless sharp cuts are made to carbon emissions.
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No Gas, No Food, World Hungry
Imagine waking up one morning and finding that the price of wheat flour, rice, and milk has doubled overnight. Your grocery bag costs twice as much. Farmers in your village cannot afford fertiliser. The government is scrambling. This is not a nightmare. This is exactly what the Iran war could trigger — and it starts with something most of us never think about: natural gas.
How Does Gas Connect to Your Food?
There is a process called the Haber-Bosch process — a scientific method that mixes nitrogen from air with hydrogen from natural gas to create ammonia. Ammonia is then turned into urea, which is the fertiliser that farmers spray on wheat, rice, and maize fields. Simply put — no natural gas, no fertiliser. No fertiliser, no food.
Around 80% of the cost of making fertiliser comes from natural gas. So when gas supply gets disrupted even for a few weeks, fertiliser factories slow down or completely shut. Farmers get less fertiliser. Crops grow weaker. Harvests fall. And your plate gets emptier.
The Strait of Hormuz — A Small Passage, Giant Problem
There is a narrow sea passage called the Strait of Hormuz, located between Iran and the Arabian Peninsula. Nearly 20% of the world's LNG (Liquefied Natural Gas) and 30% of global fertiliser exports pass through this tiny corridor every single day.
Major countries like Qatar, Saudi Arabia, and UAE export fertilisers — urea and ammonia — through this route to nations across Asia, Africa, and Europe. Now, with Iran's military threatening this passage, ships are scared to pass. Fertiliser is stuck inside the Persian Gulf. The world outside is waiting — and waiting costs lives.
Worst Timing in Farming History
This war has arrived at the worst possible moment for global agriculture. Right now, farmers across the Northern Hemisphere — in USA, Canada, Europe, China, India, Russia — are preparing for the spring planting season. This is the peak time when demand for nitrogen fertiliser is at its absolute highest.
Unlike oil, which many countries store in emergency reserves, no country in the world has a strategic fertiliser reserve. If shipments are delayed even by four to six weeks, farmers will use less fertiliser and the autumn harvest will permanently fall. You cannot redo a planting season. Once that window closes, it is gone.
Your Chicken, Milk and Eggs Are Also at Risk
Many people think a food crisis only affects vegetarians. That is wrong. When fertiliser shortages reduce grain production, the price of animal feed — corn and soybean — shoots up. Livestock farmers operate on very thin profits. When feed prices rise sharply, the cost of chicken, pork, beef, milk, and eggs rises with it. A fertiliser shortage can become a full dairy and meat crisis within just a few months.
India's Mungaru Season Is in Serious Danger
For India, this situation is deeply personal — and for Karnataka and South India, it hits even closer to home. India sources nearly 60% of its total LNG imports from Middle East countries — with Qatar alone supplying over 42% and UAE adding another 11%. This makes India the most Middle East-dependent LNG buyer in the entire world.
If India's fertiliser plants cannot get affordable natural gas, domestic urea production will fall sharply — exactly before the Mungaru planting season. Mungaru is what Karnataka and South Indian farmers lovingly call the Kharif (Mungaru) season — the monsoon-driven planting window arriving around June, when farmers sow rice, ragi, sugarcane, and maize riding the southwest rains. This single season produces over half of India's total food grain. Miss this window, and there is no second chance until next year.
The government will be forced to spend thousands of crores extra on fertiliser subsidies. Every family — from a rice farmer in Mandya to a vegetable buyer in Bengaluru — will feel this burden.
Food in Cold Storage Is Also at Risk
Even food that is grown successfully may not reach your kitchen. Our food system runs on a massive cold chain — refrigerated trucks, frozen warehouses, temperature-controlled ships. As LNG prices surge, running these refrigeration systems becomes extremely expensive. More food spoils before reaching the market. Less supply means higher prices.
Countries Will Hoard, the Poor Will Starve
When prices rise and harvests fall, countries panic and stop food exports to protect themselves — exactly as happened during the 2022 Ukraine war. Wheat, rice, and sugar exports get banned overnight. Nations that depend on food imports — especially in Africa and South Asia — face severe shortages, hunger, and social unrest.
One war. One strait. One gas shortage. And the entire world goes hungry.
(Girish Linganna is an award-winning science communicator and a Defence, Aerospace & Geopolitical Analyst. He is the Managing Director of ADD Engineering Components India Pvt. Ltd., a subsidiary of ADD Engineering GmbH, Germany.)
Disclaimer: The views and opinions expressed in this article are solely those of the author. They do not necessarily reflect the views, policies, or position of the publication, its editors, or its management. The publication is not responsible for the accuracy of any information, statements, or opinions presented in this piece.
