Summer brain health: Neurologist tips for heat safety

Summer brings the promise of outdoor fun and freedom. However, heat can increase health risks. Summer weather can also affect the brain, so it’s important to take steps to support brain health and stay safe while enjoying the season.

Heat & Hydration: Why is summer harder for people with neurological conditions?

For people with neurological conditions such as epilepsy, multiple sclerosis or migraines, summer heat, dehydration and changes in routine can worsen symptoms like fatigue, dizziness and cognitive impairment. Heat can make it more difficult for the brain and nervous system to function normally.

How does heat and dehydration affect the nervous system?

Heat exhaustion and dehydration can interfere with how the nervous system functions. When the body overheats or loses fluids, blood flow to the brain decreases and electrolytes become unbalanced. This can worsen heat exhaustion symptoms such as fatigue, dizziness, brain fog, headaches, muscle weakness or problems with balance and coordination. For people with neurological conditions, heat can also temporarily intensify existing symptoms. This makes it harder for the body to regulate temperature.

What hydration tips help maintain brain health during the summer?

• Stay well hydrated to help support circulation, brain function and temperature control.
• Aim to drink fluids consistently throughout the day; don’t wait until you feel thirsty to drink fluids.
• Drink water (best) or fluids with electrolytes if you are sweating.
• Eat water-rich foods – such as fruits and vegetables – to keep you hydrated.
• Set reminders, or keep a water bottle nearby, so drinking fluids becomes part of your routine.

What are signs that heat or dehydration may be affecting you?

Symptoms can develop gradually. They may include headache, dizziness, dry mouth, fatigue, confusion, blurred vision, muscle cramps or feeling unusually weak. Some people may have trouble with concentration, balance or coordination. Dark-colored urine, reduced urination or feeling overheated are also warning signs. If symptoms escalate, or feel sudden or severe, it’s important not to ignore them.

What are tips for staying hydrated and safe on hot days?

• Plan activities during cooler parts of the day, such as early morning or evening.
• Take frequent breaks in shaded or air-conditioned spaces and avoid prolonged exposure to direct heat.
• Dress in lightweight, breathable clothing.
• Drink fluids before, during and after being outdoors.
• Limit alcohol and caffeine, which can contribute to dehydration.
• Bring cooling towels and portable fans with you.

Most importantly, listen to your body. If you begin to feel unwell, stop what you are doing. Seek a cooler environment and hydration right away.

Medications and summer changes

Medications can work differently in summer. Heat and dehydration affect how the body processes medicine. They may also increase the risk of side effects or heat-related illness.

Why do medications impact patients differently during summer?

Many medications affect how the body regulates temperature, fluids or electrolytes. Hot weather increases sweating and fluid loss. This can amplify medication side effects. It can also change how the body absorbs and processes medication. Some medications interfere with sweating or thirst signals. This makes it harder for the body to cool itself or recognize dehydration. For people with neurological conditions, these effects can increase the risk of heat‑related illness or symptom flares during summer.

What medications can cause heat sensitivity or dehydration?

Certain medications can increase dehydration risk or heat sensitivity by affecting sweating, fluid balance or awareness of thirst. Common examples include:

• Diuretics (water pills) increase fluid loss.
• Anticholinergic medications (those that tell your body to stop producing fluids) can reduce sweating and impair cooling.
• Some antidepressants and antipsychotics may interfere with temperature regulation.
• Medications used for blood pressure or heart conditions can affect circulation and electrolyte exchange during the hotter months.

People taking these medications should take extra precautions during hot weather. Talk with your care team about summer safety.

What are common medication mistakes during summer routine shifts?

Changes in routine during summer – such as travel, delayed meals or altered sleep schedules – can lead to medication missteps. Common mistakes include:

• skipping doses
• taking medications later than usual
• not drinking enough fluids when taking medications, or
• storing medications in hot environments like cars or beach bags.

Some medications lose effectiveness or become unsafe when exposed to elevated temperatures. These issues can increase side effects or reduce symptom control, especially for people managing neurological conditions.

Summer travel and being on the go

Summer travel can make it harder to stay on track with medications and hydration. Planning ahead can help people with neurological conditions stay safe, comfortable and in control while on the go.

How should people with neurological conditions prepare for travel?

Preparation starts with keeping routines as consistent as possible. Before traveling, it is important to:

• review medications
• plan for regular dosing times (especially across time zones) and
• identify places to rest and stay cool along the way. 

Building in extra time, staying hydrated and knowing where to access medical care if needed can help reduce travel stress and prevent symptom flare-ups.

What should you pack and plan for during summer trips?

Packing thoughtfully can make a big difference.

• Bring enough medication for the entire trip (plus extra in case of delays), along with a list of medications and care team contacts.
• Include items that support cooling and hydration – such as a reusable water bottle, electrolyte packets, lightweight clothing and sun protection.
• Plan for access to air conditioning, shaded breaks and a flexible schedule to avoid overexertion.

Safe Summer Exercise: Protecting your brain while staying active

With the right precautions, people with neurological conditions can exercise safely and comfortably during the summer.

How can patients stay active while protecting brain health?

Choose lower-impact activities and adjust intensity based on how you feel. This is especially important in warmer weather. Stay hydrated, take frequent breaks and exercise during cooler times of the day. This can help maintain energy levels and prevent symptoms from worsening.

Is it safe to exercise outdoors in the heat with a neurological condition?

Outdoor exercise can be safe with the right precautions. However, heat sensitivity is common with many neurological conditions. It is important to limit time in high temperatures and avoid peak heat hours. Also prioritize cooling strategies like shade, hydration and rest.

Knowing when to get help

Knowing which symptoms to take seriously – and when to act – can help prevent more serious complications.

What symptoms are important to not disregard?

Symptoms such as confusion, difficulty speaking or thinking clearly, severe dizziness, fainting or loss of coordination should never be ignored. Other warning signs include persistent headache, nausea, muscle cramps, or extreme fatigue – especially if they worsen or do not improve with rest, cooling, and hydration. When in doubt, check in with a care team.

Have a “brain‑healthy” summer

With a little planning and awareness, you can enjoy all that summer has to offer while protecting your brain health. Stay cool, hydrated and consistent with your routines. Listen to your body and act early when symptoms arise. This can help you stay safe, active, and feel your best all season long.