When Berlin reached 39 degrees Celsius, Leila Mertens decided to spend 300 euro on an air conditioner because she "couldn't stay indoors or sleep at night".

Maintaining air conditioner temperature around 26-28 degrees Celsius, staying hydrated, resting your eyes, and using artificial tears when needed can help alleviate dry eyes.

Setting the air conditioner below 20 degrees Celsius, neglecting maintenance, and entering a cold room directly after sun exposure can lead to dry skin, fatigue, and an increased risk of developing bronchitis or pneumonia.