The town of Phalodi in Rajasthan, India, has recorded a temperature of 47 degrees Celsius, the highest ever measured in the country. This event, while geographically specific, is a symptom of a global fever that is rising with inexorable steadiness. The British climate scientists who have been tracking these anomalies for decades are now using language we have not heard before: they speak of catastrophe.
Let us consider the physics. The Earth’s energy balance is governed by the concentration of greenhouse gases in the atmosphere. For every doubling of CO2, the planet’s surface temperature rises by roughly 3 degrees Celsius. We have increased CO2 from 280 parts per million in the pre-industrial era to 420 parts per million today. That is a 50 percent increase, which under current estimates commits us to a warming of about 1.5 to 2 degrees Celsius over the next century if emissions cease immediately. They will not cease immediately.
The Indian record is not an isolated spike. It is part of a pattern: the European heatwave of 2003, the Siberian fires of 2020, the Australian bushfires of 2019-2020, and the recent floods in Pakistan and Germany. Each event is a data point on a curve that is accelerating. The British Met Office has confirmed that July 2023 was the hottest month on record globally. The average global temperature was 1.5 degrees above pre-industrial levels. That is the number that policymakers have been trying to avoid. We have crossed it.
The consequences are cascading. In India, the heat is causing crop failures, water shortages, and mass migration. The heatwave is a threat multiplier: it increases the risk of conflict over resources, raises mortality rates among the elderly and the poor, and exacerbates existing political tensions. The British scientists I have spoken with this week are not alarmists; they are data modellers who have spent their careers being careful. But their models are now generating results that are so severe that they feel compelled to speak out.
Take the Amazon rainforest. It is a carbon sink, absorbing about 2 billion tonnes of CO2 each year. But warming and deforestation are reducing its capacity. Some models suggest it could become a net source of carbon by the end of the decade. That would be a feedback loop: more CO2 means more warming, which means more emissions from the Amazon. The same is true of the Arctic permafrost, which contains twice as much carbon as the atmosphere. It is now melting faster than predicted.
There are technological solutions, of course. Solar and wind power are now cheaper than fossil fuels in many parts of the world. Battery storage is improving. Electric vehicles are beginning to dent demand for oil. But the pace of transition is too slow. The International Energy Agency has stated that to meet the Paris Agreement targets, renewable energy must be added at three times the current rate. We are not there.
And then there is the matter of political will. The G20 countries, which produce 80 percent of global emissions, have made commitments but have not met them. The UK has cut emissions by about 40 percent since 1990, but this is largely due to outsourcing manufacturing to China. Adjusting for trade, our consumption-based emissions have barely changed. The US, the second-largest emitter, has passed the Inflation Reduction Act but still relies heavily on oil and gas. India, which is suffering the consequences today, continues to build coal-fired power plants to lift its people out of poverty. Who can blame them?
The 47 degrees in Phalodi is not a freak event. It is a signal. The British scientists I have interviewed are unanimous: we are heading towards a world that is 2.5 to 3 degrees warmer by 2100. At that level, the kind of heat that India is now experiencing will become the new normal, not just in the tropics but in temperate zones as well. The difference between 1.5 degrees and 3 degrees is the difference between a difficult world and an unlivable one for many regions.
There is no room for sentimentality or denial. The data are clear. The only question is whether we will act with the urgency that the situation demands. The temperature has been taken. The planet has a fever. And the prognosis is not good.
