As a teacher of pupils with social, emotional and mental health (SEMH) challenges, and with ADHD myself, I have become increasingly aware of the impact that hot weather can have on attention, emotional regulation, and overall functioning.
During periods of sustained heat, particularly when accompanied by broken sleep, I notice that my own window of tolerance narrows considerably.
Fatigue from disrupted nights makes it harder to sustain concentration, process information efficiently, and manage the multiple demands of a busy school environment.
I can become more easily distracted, less patient, and more irritable than usual, with everyday challenges feeling disproportionately overwhelming.
This personal experience has deepened my understanding of the boys I teach, many of whom struggle with similar difficulties.
When temperatures rise, I often see the same pattern emerge in pupils with neurodivergent and SEMH needs: increased restlessness, reduced focus, heightened emotional responses, and a greater vulnerability to dysregulation.
Recognising these challenges through both a professional and lived-experience lens has reinforced the importance of flexibility, empathy, and proactive support during periods of hot weather.
The additional challenges of heat
As temperatures rise, many children look forward to spending more time outdoors, enjoying longer days and summer activities.
However, for neurodivergent teenagers, hot weather can sometimes create additional challenges that affect their concentration, behaviour, emotions and overall wellbeing.
Understanding the impact of heat can help adults respond with empathy and support
Emerging research suggests that neurodivergent children and young people may be particularly sensitive to the effects of heat. While hot weather does not cause their conditions, it can amplify existing difficulties and make everyday tasks more demanding.
Neurodivergence impacts executive functioning skills, including attention, working memory, impulse control, organisation, and emotional regulation.
When temperatures rise, the body and brain must work harder to regulate temperature and maintain normal functioning. This increased demand can leave fewer mental resources available for concentration and self-regulation.
As a result, some teenagers with SEND may find that symptoms become more noticeable during periods of hot weather.
Reduced focus and attention
Many parents and teachers observe that children with conditions such as ADHD appear more distracted during hot weather. Heat can affect cognitive functioning, making it harder to maintain attention, process information efficiently, and remember instructions.
In school or at home, this may present as:
- Difficulty concentrating on learning tasks
- Increased forgetfulness
- More careless mistakes
- Reduced ability to follow multi-step instructions
- Greater reliance on adult prompts and reminders
These difficulties can become particularly noticeable during assessments, extended classroom activities, or tasks requiring sustained concentration.
Increased hyperactivity and restlessness
Physical discomfort caused by heat can increase feelings of agitation and restlessness. For children who already experience hyperactivity and impulsivity, high temperatures may make it even more challenging to remain calm and focused.
Adults may notice:
- More fidgeting and movement
- Increased impulsive behaviour
- Difficulty waiting or taking turns
- Reduced patience
- Greater resistance during transitions between activities
This can sometimes be misunderstood as deliberate behaviour when, in reality, the child may be struggling to manage the combined effects of a neurodivergence and environmental discomfort.
Emotional regulation difficulties
Hot weather can also affect mood and emotional wellbeing. Children often become more irritable when they are too warm, tired or uncomfortable. Teenagers with ADHD, for example, may find it especially difficult to regulate these emotions.
Possible signs include:
- Short tempers
- Emotional outbursts
- Increased frustration
- Greater sensitivity to criticism or disappointment
- More frequent disagreements with peers or family members
Understanding the impact of heat can help adults respond with empathy and support rather than viewing these behaviours solely as a disciplinary issue.
The impact of sleep deprivation
One of the most significant impacts of hot weather is disrupted sleep. Warm nights can make it harder to fall asleep and stay asleep, leading to fatigue the following day.
Poor sleep can worsen many core symptoms, including:
- Inattention
- Impulsivity
- Hyperactivity
- Emotional dysregulation
- Reduced resilience when faced with challenges
Even a few nights of poor-quality sleep can have a noticeable effect on behaviour and learning.
Hydration matters
Children with SEND often become deeply absorbed in activities and may be less likely to recognise signs of thirst or remember to drink regularly. During hot weather, this increases the risk of dehydration.
Even mild dehydration can affect:
- Attention and concentration
- Energy levels
- Mood
- Memory
- Physical wellbeing
For children taking stimulant medication, maintaining adequate hydration can be particularly important during warmer periods.
What does the research tell us?
Research examining the relationship between heat and ADHD suggests that increased temperatures can negatively affect cognitive functioning and behavioural regulation.
Some studies have found that children with a SEND may be especially vulnerable to environmental stressors such as extreme heat.
Recent work has also highlighted concerns that young people with neurodivergence may experience greater mental health difficulties during heatwaves, further emphasising the need for awareness and appropriate support measures at home and at school.
As climate change leads to more frequent periods of extreme heat, understanding the impact on neurodivergent children is becoming increasingly important for families, educators, and healthcare professionals.
Practical ways to support children
Parents and schools can help minimise the impact of hot weather by:
- Encouraging regular hydration throughout the day
- Providing access to cool and shaded environments
- Using fans and ventilation where possible
- Scheduling demanding tasks during cooler parts of the day
- Maintaining consistent sleep routines
- Allowing regular movement and sensory breaks
- Recognising that temporary behavioural changes may be linked to heat and fatigue
Small adjustments can make a significant difference to a child’s comfort, wellbeing, and ability to engage successfully in learning and daily activities.
Hot weather presents challenges for everyone, but teenagers with SEND may experience a greater impact on attention, emotional regulation, behaviour, and sleep.
By recognising these challenges and responding proactively, parents and professionals can help children remain comfortable, regulated, and ready to thrive throughout the summer months.
