During summer heatwaves, it is more important than ever to protect yourself. Too much exposure to the sun can cause sunburns and can be exhausting in general. If you get dehydrated, the lack of moisture makes it hard for your eyes to produce tears, which can cause dry eye.
Consider using artificial tears to keep your eyes moist. And always wear a hat, sunscreen, and of course polarized sunglasses with UV protection. All this will help to keep your eyes healthy in the summer.