Islanders warned as temperatures set to climb towards potential records in approaching heatwave

A second heatwave of the year is forecast to bring exceptionally high temperatures across the Channel Islands, with conditions expected to push close to or even exceed previous records.

Forecasters have warned that very hot weather is likely throughout the week, with temperatures potentially reaching the highest levels ever recorded locally. The current official record stands at 37.9°C, and there is a possibility this could be surpassed.

Night-time temperatures are also expected to remain unusually high, offering little relief after hot daytime conditions and making sleep difficult for many.

Experts have described the incoming spell as more extreme than typical summer heatwaves, with the possibility that temperatures could approach 40°C in some areas, although this remains uncertain.

Health officials have advised people to take precautions during the hot weather, including drinking plenty of fluids, avoiding excessive alcohol, and staying out of direct sunlight during the hottest part of the day.

Residents are also being urged to schedule physical activity for cooler parts of the day, such as early morning or evening, and to use sunscreen, wear loose clothing, and cover up with hats when outside.

People are encouraged to check on older relatives and neighbours, keep living spaces cool by closing sun-facing windows and curtains during the day, and opening them when temperatures drop.

Those spending time near the coast or in the sea have been reminded to take extra care, and to be aware of the signs of heat exhaustion or heatstroke, including dizziness, confusion, and rapid breathing.

Meanwhile, indoor environments such as hospitals are preparing for the heat by taking steps to manage temperatures, including using cooling equipment where possible and monitoring ward conditions closely. However, ageing infrastructure in some facilities means there are limits to how much electrical cooling equipment can be safely used.

Staff have also increased availability of cooling aids such as fans and ice-based refreshments for both patients and staff.

The hot spell is expected to intensify over the coming days, with conditions remaining warm overnight and offering limited respite until the heatwave passes.