Heatwaves Around the World: How Technology Is Transforming Urban Heat Preparedness

From AI-powered forecasts and satellites that map urban heat to smart cooling systems and a rapidly expanding global cooling industry, cities are entering a new race: not simply to survive heatwaves, but to prepare for them before they arrive.

 

Extreme heat is no longer simply a seasonal inconvenience. It is becoming a growing threat to public health, infrastructure and everyday life across the world. Recent data from England offers a stark warning: the UK Office for National Statistics estimates that 40,063 deaths in England were associated with the hottest days between 1988 and 2025. The figure does not include the summer of 2026. The UK Health Security Agency separately estimated 2,877 heat-associated deaths during heat episodes in May and June 2026 alone, almost twice the number recorded during the whole of summer 2025.

 

The United States is experiencing a different but equally concerning trend. A recent analysis by Climate Central, reported by National Geographic, found that more than 30 U.S. cities now experience at least 30 additional days above 90°F compared with 1970. Miami has gained as many as 83 additional 90°F-plus days, while cities traditionally associated with cooler climates, including Denver and Helena, are also experiencing substantially more extreme-heat days.

 

These developments show that extreme heat is no longer limited to traditionally hot regions. It is becoming a global urban challenge, affecting health systems, electricity demand, infrastructure and the way cities are designed.

 

 

More Than a Hot Day: Why Extreme Heat Is Becoming a City Crisis

Extreme heat is increasingly emerging as a serious urban challenge, affecting public health, infrastructure and economic activity. In densely built cities, the urban heat-island effect can intensify the problem. Concrete, asphalt and buildings absorb heat during the day and release it slowly after sunset, while limited green space reduces natural cooling.

 

The danger can continue through the night. When temperatures remain high after sunset, the human body has less opportunity to cool down, increasing the health risks associated with prolonged heat exposure. Older adults, children and other vulnerable groups are among those most at risk.

 

The effects are also being felt beyond healthcare. As temperatures rise, demand for air conditioning increases, pushing electricity consumption higher and placing additional pressure on power networks. Hospitals can face a double burden, with more patients requiring treatment for heat-related problems while facilities themselves struggle to maintain safe and comfortable operating conditions.

 

These pressures are changing how cities approach heat preparedness. Instead of relying only on emergency action once temperatures rise, authorities are increasingly looking at early-warning systems, heat-risk mapping, resilient infrastructure, urban cooling and data-driven planning.

 

Before the Heat Arrives: What Can Help Predict and Prepare for the Next Heatwave?

By the time a heatwave reaches a city, there may already be limited time to respond. That is why governments and meteorological agencies are increasingly focusing on early prediction and advance preparation rather than waiting for temperatures to reach dangerous levels.

 

Weather stations, satellites and forecasting models gather information regarding atmospheric conditions all the time. Such information can be used by meteorologists to detect formation of heat waves and their potential timing. The WMO is also trying to enhance early-warning system that links weather information, forecasting and risk assessment so that people can receive warnings prior to hazardous conditions occur.

 

In addition, artificial intelligence has become yet another tool for such analysis. AI programs can examine vast amounts of weather and climate data and find patterns that can assist forecasting. Scientists are also developing systems based on artificial intelligence for predicting hazardous weather, including heat waves, though these systems should complement existing scientific forecasting techniques.

 

The final step is preparation. Warning becomes valuable when there is enough time for some action-hospitals get ready to increase admissions, energy companies expect extra demand for electricity, cities open cooling centers and governments issue warnings to vulnerable populations. The World Health Organization recommends linking heat forecasts with heat-health action plans, public communication and protection measures.

 

The process can therefore be viewed as:

Predict → Assess → Warn → Prepare → Protect

In the race against extreme heat, better forecasting does not stop the temperature from rising. It gives cities something equally important: time to respond.

 

From Prediction to Protection: How Cities Turn Data into Action

Forecasting a heatwave is just the first step, because the difficult part is turning that into action through the use of forecasts and temperature data. For example, a city can use weather forecasts combined with sensor readings on the ground, satellite imaging, demographic information, and public health data to pinpoint where the heat stress will be worst.

 

One example was recently done by the World Resources Institute (WRI). In March 2026, WRI introduced their Cool Cities Lab. The lab uses information from more than 25 cities to map heat risk down to the street and block level. This allows for the identification of where heat exposure is worst and where cool measures could make the biggest difference.

 

The city can use the heat-risk information to open up cooling centers in high-risk areas, increase access to drinking water, alter outdoor work schedules, and better prepare emergency health services. At the technical level, the process involves:

 

Data Collection → Data Integration → Risk Modelling → Heat Mapping → Decision-Making → Public Response

 

The World Health Organization recommends connecting heat-health warning systems with preparedness and response measures rather than treating warnings as standalone forecasts.

 

Cooling the Concrete Jungle: Technologies That Can Make Cities Cooler

Since extreme heat is becoming an increasing problem for cities, there is the need to look for alternative ways of cutting down temperatures without increasing the dependency on ACs. Methods such as reflective roofs, providing shade for public places, vegetation of cities, creation of green roofs, use of heat-resistant construction materials and advanced cooling technology will help in decreasing the amount of absorbed heat. Recent studies conducted around the world on sustainable cooling point out the importance of using not only energy-efficient appliances, but also nature-based solutions for cooling cities due to the increase in demands for cooling. On the other hand, cooling cities leads to yet another problem-increase in electricity consumption.

 

The global consumption of electricity for space cooling has risen greatly recently and reached the level of about 2,900 TWh, while in cases of extremely high heat, the demand for air conditioning rises dramatically at certain periods of the day. It means that there is the risk of increasing the load on electrical network systems at those times when there is a need to have reliable electricity. Moreover, constant exposure to extreme temperatures brings additional risks to people’s health, especially to elderly citizens and other vulnerable groups.

 

Major Beneficiary Markets

The increased occurrences of extreme heat have opened up new avenues for the global cooling sector, especially in regions that have few households that use air conditioners. In the European market, nations such as France, Spain, Italy, Germany, and the UK have witnessed heightened demands for cooling technologies due to repeated occurrences of heat waves. During the first six months of 2026, Chinese cooling appliances exports to Europe totaled approximately USD 3.76 billion, which represented a 43% increase from the same period a year ago.

 

India has also become an exciting market for growth in the cooling industry. Increased temperatures, urbanization, rising income levels, and increased consumer awareness on the comfort indoors have fueled demand for residential air conditioners. The AC industry in India witnessed an approximate 25% increase in unit sales and 30% rise in value during the 2026 summer period. However, China and the US still form two of the biggest cooling markets globally. China combines huge domestic demands for cooling technologies with strong production power. China is estimated to manufacture 170 million air-conditioning units annually and export about 60 million units.

 

Market Statistics

The global weather forecasting market is projected to grow from around USD 14.4 billion in 2025 to approximately USD 31.7 billion by 2035, at a CAGR of 8.2% during 2026-2035.
The global air-conditioning equipment market was valued at approximately USD 216.0 billion in 2025 and is projected to reach around USD 584.0 billion by 2035, growing at an estimated CAGR of 10.3% during 2026-2035.

 

Top 5 Global Weather Forecasting & Prediction Companies

 

Vaisala- Vantaa, Finland

Develops weather observation and environmental monitoring technologies used for forecasting and real-time weather intelligence. Its systems support aviation, roads, energy and meteorological services.

 

Meteomatics- St Gallen, Switzerland

Combines AI, weather models, satellite observations and high-resolution data to deliver localized weather forecasts. Its technology supports industries such as energy, aviation and agriculture.

 

StormGeo- Bergen, Norway

Provides weather forecasting and risk-management solutions for weather-sensitive industries. Its services are widely used across shipping, energy, aviation and other sectors.

 

Weathernews- Chiba, Japan

Provides global weather information, forecasting and risk-management services. Its technology supports industries including maritime transport, aviation, energy and agriculture.

 

Spire Global- Vienna, Virginia, USA

Operates satellites that collect atmospheric and weather data around the world. The company combines satellite observations with forecasting and analytics to provide real-time weather intelligence.

 

Top 5 Global Cooling Technology Companies

 

Daikin Industries- Osaka, Japan

A global leader in air conditioning, heat pumps and HVAC systems. It focuses heavily on energy-efficient cooling and lower-impact refrigerant technologies.

 

Carrier Global- Palm Beach Gardens, Florida, USA

Provides residential, commercial and industrial HVAC and refrigeration solutions. Its portfolio includes high-efficiency cooling systems and smart building technologies.

 

Trane Technologies- Swords, Ireland

Develops HVAC and climate-control systems for buildings and large facilities. Its technologies focus on energy efficiency, decarbonization and sustainable cooling.

 

Midea Group- Foshan, China

One of the world’s largest manufacturers of residential and commercial air-conditioning equipment. It is expanding into smart, connected and energy-efficient cooling solutions.

 

Mitsubishi Electric- Tokyo, Japan

Offers air conditioners, heat pumps, chillers and advanced building climate-control systems. Its focus includes efficient inverter technology and intelligent energy management.

 

Conclusion

Heat waves have become an issue all over the world. However, technology has come up with ways in which we can be prepared for them. AI can provide more accurate forecasts, satellites can detect heat areas, and smarter systems can ensure that cities can react quicker to the issue. Simultaneously, effective cooling solutions can keep people safe without putting too much strain on energy systems. Technology, however, cannot deal with the issue alone, proper urban design, awareness among the general public, and equal access to cooling must accompany innovations.