Baby won’t eat!

My daughter is 7 months, and lately it’s been 90 degrees where we live and she doesn’t want her bottle. I feed her breakfast as normal, cereal and fruit. & she eats dinner normal too (any vegetable). But she’s not really taking her formula. Ive been giving her water down pedialyte so she doesn’t get dehydrated. But I just don’t know what to do, I keep in her so she’s cool but she’s not herself in the heat.