My baby has very pink, dry, scaly skin on her cheeks. Is this eczema?

Is the dry skin making the skin look "tight"? If so, it could be a rash that occur due to the heat and lack of hydration. Keep baby hydrated with breastmilk or formula and try rubbing on a hypoallergenic lotion after baths. Do skip soap and long tub sessions, which can irritate skin and keep your baby's surroundings humidified.