Any tips for dealing with hot weather headaches?

It's not dehydration as I've drunk loads of water. Not sure what else to try but these annoying headaches happen every time it's warm.

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RodneyTrotter1 · 100+, M

As others have said, electrolyte supplements could help. I use a brand called High 5, they're effervescent tablets that dissolve in water and make a nice drink.. It could also be caused by UV. so try wearing sunglasses more when outside.