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On Friday 26 June 2026, Luxembourg’s Ministry of Health and Social Security issued advice to help parents protect babies during the ongoing heatwave, reminding them that infants are among the groups most vulnerable to high temperatures.

According to the ministry, the body of an infant regulates temperature less effectively. They sweat less and can become dehydrated quickly. It therefore urged parents never to leave a baby alone in a car, even for a few minutes, as temperatures inside a vehicle can rise rapidly to dangerous or even fatal levels. It also advised against leaving children in direct sunlight in a pushchair or car seat or covering a pushchair with a blanket, as this can trap heat.Their bodies regulate temperature less efficiently, they sweat less and can become dehydrated quickly.

The guidance also includes recommendations on hydration. Babies under six months who are exclusively breastfed generally do not require additional water but may need to be fed more frequently, while breastfeeding mothers should ensure they remain well hydrated. Formula-fed babies may also benefit from additional feeds. From the age of six months, babies can be offered small amounts of water regularly between meals.

The ministry also noted that parents are encouraged to keep babies in cool, shaded places, dress them in light cotton clothing and use lukewarm baths or damp cloths to help them cool down. Applying ice directly to a baby's skin is not recommended, as it can cause burns and increase the body's heat production through shivering.

Even during hot weather, safe sleeping rules remain essential. It is recommended to dress the baby lightly and avoid thick blankets, duvets, pillows, soft toys or other objects in the cot, as these prevent heat from escaping and can encourage overheating.

The ministry also stressed that safe sleeping practices remain important during hot weather. Babies should be dressed lightly; thick blankets, duvets, pillows, soft toys and other objects should be kept out of the cot to reduce the risk of overheating.

Parents should also watch for signs of dehydration or heat-related illness, including fewer wet nappies than usual, a dry mouth or lips, unusual drowsiness, excessive crying, hot or very dry skin, rapid breathing, fever, vomiting or an absence of tears when crying.

If any of these signs are present, particularly significant drowsiness or fever, it is recommended to contact a doctor promptly.