Parkinson’s and Warm Weather: Staying Well in the Heat 

People with Parkinson’s (PD) can still get dehydration, heat exhaustion, or heat stroke like anyone else. Some people find their symptoms worsen in higher temperatures. Not everyone notices sensitivity to heat, but even small increases in temperature can affect how you feel. 

Can heat worsen Parkinson’s symptoms or increase the risk of general heat-related problems? 

PD can affect the autonomic nervous system (the body’s temperature control), so you may find that you may heat up faster, sweat more and cool down more slowly than others. Heat and sun exposure can worsen fatigue and increase dehydration. This can impact movement or motor symptoms, and some people may experience dizziness or headaches due to dehydration. Hot weather at night can disrupt sleep, which may lead to increased fatigue and worsening of symptoms the next day. 

Can heat affect your Parkinson’s medication, or make your skin more sensitive to the sun? 

Most Parkinson’s medications do not directly increase sensitivity to the sun. However, some people may still be more vulnerable to heat and sun due to side effects like low blood pressure, dizziness, or dehydration. Other medications can increase sun sensitivity, so it is important to be aware. Regardless, sun protection is important for everyone — use sunscreen, wear a hat, and limit direct sun exposure where possible. It’s also important to check your skin regularly and be aware of any new or changing moles or spots, and to seek medical advice if you have any concerns. 

Is there anything to add about adjusting exercise routine? 

Exercise remains important, but you may need to adjust your routine in hot weather. Aim to exercise in the early morning or evening, reduce intensity, and take more frequent breaks. Listen to your body and avoid pushing through fatigue or dizziness. If you are sweating more or doing higher‑intensity activity, make sure to increase your fluid intake. 

Why is hydration important in Parkinson’s? 

Hydration is one of the biggest factors in how you feel. Your body needs fluids for blood pressure, bowel function, and brain health. If you have bladder symptoms, you may be tempted to drink less, but this can make symptoms worse overall. It’s about balance. Warmer temperatures increase sweating and the risk of dehydration, so it is important to replace fluids regularly. It’s also worth being aware that both air travel and alcohol can increase the risk of dehydration. 

Tips: 

• Drink regularly, not just when you feel thirsty. Aim for small, frequent sips, and keep a drink with you to have throughout the day. 

Include: 

• Water 

• Diluted juice 

• Oral rehydration drinks in very hot weather (speak with your pharmacist for further advice) 

Watch out for: 

• Dark urine 

• Headaches 

• Dizziness 

• Increased confusion 

• Constipation- Water is a great laxative, and we know the effect constipation can have on the absorption of your medication!  

How can people with Parkinson’s stay cool? 

• Stay hydrated! 

• Wear light, loose clothing 

• Stay in the shade or indoors during peak heat 

• Use fans, cool showers, or damp cloths 

• Keep your environment as cool as possible, both day and night 

Are there any other changes/precautions people with Parkinson’s should make/take in the heat? 

• Be sun aware! Sunscreen helps protect the skin from harmful UV rays, reducing the risk of sun damage. Choose a broad‑spectrum sunscreen and remember to reapply throughout the day, especially if sweating or spending time outdoors. It is important for everyone to be sun safe, be aware that even on cloudy days, UV rays can still cause damage. 

• Avoid the hottest part of the day by planning indoor activities and stay in the shade where possible. 

• Enjoy an afternoon rest, if possible, to rejuvenate & reset.  

Other helpful steps include 

• standing up slowly to reduce dizziness 

• choosing smaller, lighter meals or more frequent snacks, if your appetite is low.