How extreme heat tests the limits of space probes and human infrastructure
From the solar-scorched path of the Juice spacecraft to the record-breaking heatwaves in England, rising temperatures present a shared engineering and survival challenge. Whether protecting a multi-billion euro mission or preparing a nation for a warming climate, managing thermal extremes requires radical new strategies.
The European Space Agency’s Juice mission is currently navigating a high-stakes thermal environment. Having launched in April 2023, the spacecraft is on an eight-year trek toward Jupiter, with an expected arrival in 2031. During 2025, the mission faced significant thermal stress during its closest approach to the Sun and a strategic flyby of Venus. To survive these periods, thermal engineers like Romain Peyrou-Lauge utilize specialized technologies to shield the probe from intense solar radiation while it prepares for its eventual arrival at the gas giant.
On Earth, the challenges of rising temperatures are manifesting in more permanent ways. The summer of 2022 saw England endure five distinct heatwave periods, including temperatures that exceeded 40°C for the first time. This extreme heat was linked to nearly 3,000 additional deaths across the country and is estimated to impose an annual economic burden of between £260 million and £300 million on the UK economy.
The crisis also reveals a structural vulnerability in human architecture. Because much of the UK's housing stock was designed to retain warmth rather than expel it, over 50% of British homes are now considered at risk of overheating. While new building regulations have begun to address this, older structures remain unprotected. As climate change makes extreme heat events more frequent, experts suggest that current fragmented policies and the lack of a dedicated Heat Risk Strategy may leave both populations and infrastructure increasingly exposed.
Source: Turning up the heat | The journey of Juice (episode 2)
