Extreme heat in Spain is not simply an inconvenience to be endured with a cold drink and a shrug. Spanish summers regularly produce conditions that official health authorities treat as a genuine risk to life, particularly for older people — and the risk is largely preventable. This guide explains how AEMET's warnings work, who is most at risk, how to recognise heat exhaustion and heatstroke, and the practical daily habits that make a real difference.
There is no single Spanish summer. The country contains several genuinely different climates, and the gap between them in July and August is enormous — a guide for someone in San Sebastián would be useless in Córdoba.
Broadly: inland Andalucía, Extremadura and the Guadalquivir and Ebro valleys are the hottest parts of the country, hot in a way that surprises even people who thought they had prepared for it. The interior of the peninsula, including Madrid, Castilla-La Mancha and Aragón, gets very hot days with somewhat better night-time relief. The Mediterranean coasts — Costa Blanca, Costa Cálida, Costa del Sol — usually record lower daytime maximums than the inland south, but hold humidity and warmth overnight, which brings its own problems. The northern strip, from Galicia through Asturias to the Basque Country, is markedly milder, though not immune. The Canary Islands are moderated by the Atlantic, but can be hit hard when a calima pushes hot, dusty air across from the Sahara.
To put numbers on the extreme end, all from Spain's national weather agency: during the heatwave of 11 to 16 August 2021, AEMET recorded 47.0 °C at Alcantarilla air base on 15 August, described by the agency as the absolute record of its principal station network, alongside 46.9 °C in Córdoba, 46.2 °C in Murcia and 46.0 °C in Granada. Those are exceptional figures rather than typical ones — but they show what the south and south-east are capable of.
The broader trend is documented too. AEMET reported that June 2026 had a mean temperature of 23.3 °C across peninsular Spain, 3.2 °C above the 1991–2020 average, making it the second-warmest June in a series going back to 1961, and noted that 13 of the 15 warmest Junes on record have occurred in the 21st century. If you are choosing where to settle, that is worth weighing alongside the usual considerations — our guide to the best places to live in Spain looks at the regional trade-offs.
Sources: AEMET — climate summary, August 2021; AEMET — June 2026 was the second warmest of the historical series.
It is easy to file heat under “unpleasant” rather than “dangerous”, especially if you moved to Spain because you like the sun. Spain's public institutions do not treat it that way.
The Ministry of Health has run a national plan of preventive actions against the effects of excess temperatures on health every summer since 2004, with the stated objective of reducing the impact on the population's health as a consequence of excess temperature. A country does not maintain a national inter-institutional plan for two decades over something trivial.
Separately, the Carlos III Health Institute runs MoMo, the daily all-cause mortality monitoring system, which compares observed daily deaths against what would be expected from historical series and estimates mortality attributable to extreme temperatures. Its panel is updated daily, with a companion panel issuing daily alerts related to extreme-temperature mortality. The existence of that system is the point: heat's effect on health is measurable and monitored in near real time.
The World Health Organization frames it in a way worth holding on to: the negative health impacts of heat are, in its words, predictable and largely preventable.
Sources: Ministerio de Sanidad — Calor extremo; ISCIII / CNE — Vigilancia de la mortalidad diaria (MoMo); WHO — Climate change, heat and health.
The first practical skill for living through a Spanish summer is learning to read avisos — the weather warnings issued by AEMET, the state meteorological agency, under its Meteoalerta plan. You will see them referenced constantly in local news and on town hall social media, and they trigger a lot of official action. There are three levels, each with its own official instruction to the public:
Danger is low, but vulnerable people and those in exposed areas could experience some impact. The official guidance is “esté atento” — stay alert and keep up with the latest forecast. Yellow is common in southern Spain in high summer and is not a reason to change your life, but it is a reason to check on anyone frail.
A significant risk, with serious consequences possible for vulnerable groups and exposed areas. The official guidance is “esté preparado” — take precautions and stay informed. Orange is the level at which to genuinely reorganise your day: bring anything strenuous forward to the early morning and treat the middle of the day as time to be indoors.
Extraordinary danger, with the potential for very serious or even catastrophic impacts. The guidance is to take preventive measures and act on the instructions of the authorities, avoiding non-essential travel. Red heat warnings are rare, and should be treated as the serious event they are.
Warnings are issued for defined geographic zones grouped from neighbouring municipalities with similar adverse-weather climatology, not for the country as a whole — which is why your province can sit under an orange warning while its neighbour is clear.
Sources: AEMET — help and warning levels; AEMET — weather warnings by province.
Running alongside AEMET's meteorological warnings is a health-based system: the Plan Nacional de Actuaciones Preventivas de los Efectos del Exceso de Temperaturas sobre la Salud, activated by the Ministry of Health each summer from May through September, coordinating national bodies, the autonomous communities and local administrations.
The important difference is that this plan is health-oriented rather than purely meteorological. AEMET supplies forecast maximum temperatures for the day ahead and the following two days; those are compared against thresholds derived from percentiles of local maximum and minimum temperatures, so what counts as dangerous in Bilbao is not what counts as dangerous in Seville. Heat harms people relative to what their bodies and their housing are adapted to.
The plan assigns a daily risk level to each zone:
The country is divided into meteosalud (meteorological-health) zones for this purpose, and the Ministry publishes a daily risk-level map so anyone can look up their own area. AEMET aligns its special heat warnings with the episodes the health plan flags as significantly elevated risk, which is why the two systems usually tell a consistent story. For a household, the practical value is simple: the plan converts an abstract temperature into a stated level of risk for where you live.
Sources: Ministerio de Sanidad — Plan Nacional, risk-level maps; Plan Nacional de Exceso de Temperaturas 2026 (PDF); AEMET — prevention of the effects of high temperatures.
This is the part people tend to skip, and it matters most. Heat does not affect everyone equally, and being honest about that is more useful than reassuring generalities.
Risk rises sharply with age. The Ministry of Health's public materials place people over 65 at the top of the at-risk list, and that is not a technicality: older bodies regulate temperature less efficiently, thirst is a less reliable signal, and long-term conditions and their treatments are more common. If you are in your seventies or eighties, or you have a parent who is, this page is written for you first.
The other groups Spanish authorities identify as facing greater risk are:
Two entries stand out for expats. Housing: much older or holiday-built property is hard to cool, and arrivals from cooler countries often do not yet use the shutters and shade locals take for granted. And isolation — in a new area where you do not know your neighbours, nobody notices a bad afternoon.
Sources: Ministerio de Sanidad — En verano protégete del calor (PDF); Ministerio de Sanidad — activation of the national heat plan; WHO — Climate change, heat and health.
The single most useful thing to take from this guide is the difference between heat exhaustion (agotamiento por calor) and heatstroke (golpe de calor or insolación). Heat exhaustion is the body struggling; heatstroke is the body's temperature regulation failing, and Spanish health authorities describe it as a life-threatening emergency. The table below sets out the warning signs and recommended first actions as published by Spain's Ministry of Health.
| Heat exhaustion — agotamiento por calor | Heatstroke — golpe de calor | Urgency | |
|---|---|---|---|
| Temperature | Fever below 40 °C | Fever above 40 °C | Emergency |
| Skin | Cold, pale, clammy skin; sweating | Hot, reddened skin; there may be no sweating | Emergency |
| Pulse & breathing | Rapid, weak pulse | Rapid, strong pulse and breathing | Emergency |
| How the person seems | Headache, nausea, dizziness, vomiting, tiredness | Possible seizures, hallucinations, irritability or behaviour change, altered consciousness or fainting | Emergency |
| Official first action | Move to a cool place, sip water, loosen clothing, apply damp cloths or a cool bath | Call 112 immediately; move to a cool place and help bring the temperature down; give nothing to drink | Call 112 |
| Seek medical help | Immediately if the person has chronic illness, is vomiting, or symptoms worsen or last more than an hour | Immediately — it is a vital emergency | Call 112 |
A note on judgement: none of this is a diagnostic tool, and the two conditions sit on a spectrum rather than in tidy boxes. The practical rule in official guidance is that heat exhaustion not improving within an hour, or involving vomiting, or affecting someone with a chronic condition, needs medical attention rather than more patience. If you are weighing up whether to call, call.
Source: Ministerio de Sanidad — En verano protégete del calor: síntomas y cómo actuar (PDF). See also our guide to emergency care in Spain.
Spain's Ministry of Health publishes a ten-point set of recommendations each summer. They are unglamorous, and that is the point — the things that keep people out of hospital in a heatwave are all small and repeatable.
The official advice is to drink water or fluids frequently, and specifically even when you do not feel thirsty. Thirst is a lagging indicator, and becomes less reliable with age. Keep a bottle where you will see it rather than relying on remembering.
The Ministry explicitly advises avoiding caffeinated and alcoholic drinks in hot weather, and alcohol appears on its list of factors that increase risk. Hard advice to follow in a country where a cold beer at midday is practically architecture — but a heatwave is the moment to make it a small one, later, with water alongside.
Light meals, eaten more frequently, with fruit and vegetables that help replace fluid and salts. Heavy midday meals in extreme heat make most people feel worse.
Reduce physical activity and avoid outdoor sport in the central hours — shift exercise, gardening, DIY, shopping and dog walks to early morning or late evening. This is precisely why Spanish daily life is shaped the way it is: the long lunch and the closed afternoon shutters are not laziness but a working adaptation to a climate, and copying them is the single most effective change most new arrivals can make.
Light, loose, breathable clothing; a hat and sunglasses; sun protection on exposed skin. Seek out cool, shaded or air-conditioned places, and cool down whenever you need to — a cold shower or wet cloths on the neck and wrists work quickly. The guidance on vehicles is blunt and covers people of any age: never leave anyone in a closed, parked car. The interior temperature climbs far faster than people expect, and the same applies to animals.
Some medicines have storage temperature limits that a Spanish flat in August will exceed. Check the packaging, and ask your pharmacist about anything you are unsure of.
Source: Ministerio de Sanidad — preventive recommendations for high temperatures.
Spanish homes are built and used differently, and understanding the logic makes a large difference to how safe and comfortable your summer is.
The external roller shutters on most Spanish windows are not a privacy feature; they are a thermal one. Because they sit outside the glass, they block solar gain before it enters the room, which is far more effective than any curtain. The traditional rhythm is to open the house up overnight and in the early morning to flush the heat out, then close shutters and windows on the sunny side before the sun gets high and keep the house shut through the afternoon. Newcomers often do the opposite — throwing everything open at midday because it feels stuffy — and import hot air all afternoon.
Air conditioning is genuinely protective for vulnerable people during a heatwave, and there is no virtue in suffering without it. The WHO suggests setting cooling to around 27 °C for efficiency; a flat does not need to be cold to be safe. Without air conditioning at home, the official advice is to spend time in cool places — in most Spanish towns a shopping centre, a library, a municipal building or a centro de día, some of which open as designated cool spaces during heat episodes.
Fans help by moving air across skin, but in very high temperatures they are a comfort measure rather than a cooling one, and they do not substitute for lowering the temperature or getting fluids in. The other useful fixes are ordinary: awnings on west-facing windows, a shaded terrace, closing off unused rooms, cooking early. And if you are still house-hunting, orientation, shutters, insulation and which floor you are on deserve as much attention as the view — a top-floor flat with west-facing glass and no shutters is a very different proposition in August from a ground-floor place with thick walls and a shaded patio.
Most people judge a heatwave by the daytime maximum. Health authorities do not. Spain's national heat plan sets thresholds using percentiles of both maximum and minimum temperatures, and AEMET's warning thresholds likewise cover minimum as well as maximum temperature. The reason is straightforward: the body recovers overnight, and if the night never cools, the strain accumulates from one day to the next.
That is why a run of consecutive hot days is more dangerous than a single very hot one, and why coastal areas — lower daytime peaks, but nights that stay warm and humid — are not automatically safer than the inland south. AEMET tracks noches tropicales, tropical nights when the minimum temperature stays unusually high; they are a recognised feature of Spanish summers, particularly along the Mediterranean.
The practical steps are the ones you would use anywhere, applied more deliberately: cool the bedroom during the day rather than at bedtime, keep shutters closed and open the house late, use a fan for air movement, take a cool shower before bed, and keep water within reach. For older people and anyone with a heart or respiratory condition, a bedroom that stays hot all night is one of the situations most worth solving properly, including with air conditioning if that is an option. If broken summer sleep is affecting how you feel more generally, mention it to a doctor rather than absorbing it — our guide to seeing a doctor in Spain explains both the public and private routes.
Spain's official heat guidance ends on a point that is easy to skim past and is probably the most important thing on it: visit people who are vulnerable or who live alone in hot homes, remind them of the recommendations, and keep an eye on them during heat episodes.
This matters disproportionately in expat communities. Many people who have retired to Spain live at some distance from adult children, in areas where the social network is seasonal and properties empty out in August. Someone can have a very bad two days without anyone noticing.
If you are arranging cover for an older parent who has moved to Spain, our guide to health insurance for retirees in Spain covers the options and age-related considerations, and how Spanish public healthcare works explains the public entitlement side.
Source: Ministerio de Sanidad — En verano protégete del calor (PDF).
Outdoor workers appear on every official at-risk list, and Spain has legislated on the point: since 2023 the workplace health and safety regulations (Real Decreto 486/1997) include a specific provision on environmental conditions for outdoor work.
Where AEMET or the relevant regional meteorological service issues an orange or red adverse-weather warning, and existing preventive measures are not enough to protect workers, the employer is obliged to adapt working conditions — expressly including reducing or changing the hours of the planned working day. The wording is “resultará obligatoria la adaptación de las condiciones de trabajo, incluida la reducción o modificación de las horas de desarrollo de la jornada prevista”.
If you employ anyone who works outside — on a build, in a garden, doing deliveries — that is a legal obligation rather than a courtesy, and Spain's national institute for health and safety at work (INSST) runs a summer campaign on protecting outdoor workers from heat and solar radiation. If you are the one working outside, an orange warning is a legitimate reason to raise it with your employer.
Athletes and people exercising outdoors in the central hours are named in the Ministry's own risk list, and it is a group that skews towards people who consider themselves fit and therefore exempt. Padel at 2pm in July in inland Andalucía is a bad idea regardless of how well you are training. Move it early, hydrate before as well as during, and stop at the first sign of dizziness, nausea or headache. Hiking deserves particular care because it combines exertion, exposure and distance from help, and several regions restrict access to natural areas during the high fire-risk conditions that often accompany extreme heat — check locally before setting out.
Sources: BOE — Real Decreto 486/1997, disposición adicional única (consolidated text); INSST — outdoor work and heat prevention campaign.
Dogs and cats are affected by heat differently from people, they cannot tell you what is wrong, and the warning signs and first-aid steps are not the same. Rather than compress it here, we have a separate guide: heatstroke in pets in Spain covers the symptoms in dogs and cats, how to cool an overheated animal safely, when to get to a vet, and how to plan walks around the Spanish summer.
Heat-related illness is not a special category of medical problem — if you need to be seen, you are seen the same way you would be for anything else. So the practical question is not “is heatstroke covered?” but “do I know exactly where to go, before the day it matters?”
Write these down somewhere findable. If you are hosting older relatives over the summer, put the same list on the fridge.
Private health insurance does not make heat safer. What it can do is shorten the distance between noticing a problem and having it looked at — direct access to clinics and specialists, and in many cases English-speaking support and video consultations, which matter more than people expect when you are unwell and translating at the same time. For what a full plan typically includes, see comprehensive health insurance in Spain.
If you want a straightforward conversation about which plan suits where you live and who you are covering, our English-speaking advisers can talk it through — get in touch or request a quote below.
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