Extreme heat is not only uncomfortable. During pregnancy, after birth and in early childhood, the body may have less room to cope with rising temperature and dehydration. A useful family response is simple: check local warnings, reduce heat exposure, keep cooling and safe fluids available, and know which symptoms require urgent care.
Why the new global framework matters
Recently, the World Health Organization, World Meteorological Organization, UNICEF and the United Nations Population Fund launched a shared framework for tracking the health effects of heat on pregnant women, newborns and children. It asks health systems to connect weather information with outcomes such as preterm birth, stillbirth, low birthweight, pregnancy hypertension, child deaths and visits to health facilities.
That may sound like a job for governments rather than families. Yet the logic is relevant at home too: heat becomes easier to manage when it is noticed early, linked to symptoms and followed by a clear response. Waiting until someone collapses is not a heat plan.
WHO reported that evidence links heat exposure with a 26% increase in the odds of preterm birth. This figure describes an association across research, not a prediction that one hot day will cause an early delivery. Individual risk depends on the intensity and duration of exposure, living and working conditions, health, pregnancy stage and access to cooling and care.
The same release noted that babies under one year experienced far more heatwave days in 2024 than during the 1986–2005 baseline. Newborns and young children depend on adults for shade, clothing, fluids and transport. They cannot reliably describe dizziness, thirst or confusion, which makes observation especially important.
Pregnancy changes how heat is experienced
Pregnancy raises the demands placed on the cardiovascular system. Blood volume increases, the heart works harder and the body produces additional heat. Nausea and vomiting can also make hydration more difficult. A person may therefore feel unwell sooner during prolonged heat, especially when working outdoors, travelling, cooking in an unventilated room or living without reliable electricity.
Heat does not affect everyone equally. A well-ventilated home with dependable water offers more protection than a crowded top-floor room, informal workplace or settlement with intermittent supply. Air pollution, medication, fever, heart or kidney disease and high humidity can add strain. Humidity matters because sweat cools the body less effectively when the surrounding air is already heavy with moisture.
Routine antenatal care remains important during hot periods. A headache, swelling or reduced fetal movement should not automatically be blamed on the weather. Pregnancy conditions such as pre-eclampsia can also cause headache, visual disturbance and illness, and they require medical assessment.
Babies and children may show different warning signs
A baby who is too hot may be unusually sleepy, irritable, feeding poorly or producing fewer wet nappies. The skin may feel hot, but touch alone cannot reliably determine whether the child has a fever or heat illness. A thermometer and clinical advice provide better information.
Older children may complain of headache, nausea, cramps, weakness or dizziness. They may become unusually quiet, clumsy or confused. Heavy sweating can occur in heat exhaustion, but a lack of sweating does not prove that someone is safe. Behavioural change is often the clue that matters most.
Heat stroke is an emergency. Confusion, collapse, seizure, very high body temperature, severe breathing difficulty or inability to drink requires urgent medical help. Begin active cooling while help is arranged: move the person to shade or an air-conditioned place, remove unnecessary clothing and cool the skin with water and airflow. Do not force fluids into a person who is confused, vomiting repeatedly or not fully conscious.
Build a family plan before the hottest hours
A practical plan begins with the forecast. Use an official local weather or disaster-management service rather than relying only on a generic phone icon. Heat alerts may reflect nighttime temperature and humidity as well as the daytime maximum.
Identify the coolest usable place available. It might be one shaded room, a relative’s home, a community cooling centre, a library, a clinic waiting area or an air-conditioned public building. If a move is necessary, decide how to reach it before transport becomes difficult.
Shift demanding tasks away from the hottest hours where possible. This includes outdoor exercise, long market trips and cooking methods that add substantial indoor heat. Employers and schools also have responsibilities; personal planning cannot replace safe working conditions, rest breaks, water and heat policies.
Keep drinking water accessible. Pregnant adults and children should drink regularly rather than waiting for intense thirst. For infants, feeding guidance depends on age. Exclusively breastfed babies generally receive their fluids through breast milk and may feed more often in hot weather. Formula must be prepared exactly as directed with safe water; adding extra water can be dangerous. Parents should ask a qualified clinician about any infant-specific concern rather than improvising.
Light, breathable clothing and shade reduce heat gain. Fans can improve comfort and help sweat evaporate, but in very hot conditions a fan alone may not adequately cool the body. Cool showers, damp cloths and air conditioning can help when available. Never leave a child, pregnant person or animal inside a parked vehicle, even for a short errand.
Medicines and health conditions need extra thought
Some medicines affect sweating, fluid balance, blood pressure or alertness. Diuretics increase urine output; some psychiatric, allergy and heart medicines can also change heat tolerance. This does not mean they should be stopped during hot weather. Sudden changes can cause harm.
Ask a pharmacist or clinician what to do during a heatwave, particularly if the person has kidney disease, heart disease, diabetes or a history of fainting. The plan may include more frequent monitoring, but it must be individualised. People placed on fluid restrictions should not simply increase water intake without advice.
Medicine storage also matters. Cars, window ledges and non-air-conditioned rooms can exceed recommended storage temperatures. Check the label and ask a pharmacist if a medicine, insulin supply or test strip has been exposed to excessive heat.
Also Read: Buying Medicines Online Safely and Spotting Warning Signs
The home plan cannot solve structural heat risk
Advice to “stay cool” is incomplete when a family cannot afford electricity, lacks running water or must work outdoors. The new WHO framework is valuable because it treats heat as a health-system and policy issue. Monitoring can reveal which districts see more pregnancy complications, child illness or missed school days during extreme heat.
Useful responses may include earlier warnings, cooler maternity wards, shaded school spaces, adjusted working hours, reliable water, transport support and outreach to households with newborns. Data should lead to action rather than simply documenting suffering.
Families can still improve readiness. Save maternity, paediatric and emergency numbers. Keep identity and medical documents together. Tell a trusted person if a pregnant family member will be alone during a heat alert. Check on neighbours with babies, disabilities or limited mobility.
The central lesson is not that every hot day will cause serious illness. It is that extreme heat is a predictable exposure, and predictable exposures deserve a plan. Watch the forecast, reduce exposure early, treat new symptoms seriously and seek help when cooling and rest do not quickly improve the situation.
People also ask
Can extreme heat cause preterm birth?
Research finds an association between heat exposure and higher odds of preterm birth. It does not mean that a single hot day will cause labour, and individual risk varies. Contractions, fluid leakage, bleeding or pelvic pressure before 37 weeks need prompt maternity advice.
How much water should a pregnant person drink in a heatwave?
Needs vary with body size, activity, health, climate and pregnancy. Drink regularly and follow local maternity guidance. A person with heart or kidney disease, vomiting or a prescribed fluid restriction should seek individual advice.
Should an exclusively breastfed baby receive extra water?
Usually, exclusive breastfeeding supplies the fluid a young infant needs, with more frequent feeds during heat. Do not give extra water without age-appropriate professional guidance.
Is a fan enough during extreme heat?
A fan may improve comfort, especially with damp skin, but it may not prevent dangerous overheating in very high temperatures. Move to a cooler place when available and follow local heat guidance.
What is the difference between heat exhaustion and heat stroke?
Heat exhaustion may cause heavy sweating, weakness, nausea, headache or dizziness. Heat stroke involves dangerous overheating and neurological symptoms such as confusion, seizure or collapse and requires emergency care.
When should a pregnant person seek urgent help during hot weather?
Seek urgent advice for fainting, confusion, severe or persistent headache, visual changes, breathing difficulty, reduced fetal movement, bleeding, fluid leakage or regular painful contractions.
References
- World Health Organization. “New global framework launched to track increasing health risks of extreme heat for pregnant women, newborns and children.” 21 October 2026.
- WHO, WMO, UNICEF and UNFPA. Priority indicators to monitor the impact of heat exposure on maternal, newborn and child health. 21 October 2026.
