Translation of "Dehydrated" in Japanese

I'm mega-dehydrated.

ひどい脱水症状だ

She immediately gave him formula because he was pretty dehydrated.

かなりの脱水症状を示していた息子は すぐにミルクを与えられました

"When they say your pee is amber-colored, that means you're dehydrated."

「小便が琥珀色だと言われたら、脱水症状だ」

Babies can become dehydrated from a high fever, so I was told that it would be better to send him to the hospital.

赤ちゃんは高熱で脱水症状になりがちだから、入院した方がいいって言われた。