Young children will often cry to indicate thirst. Teach your baby the sign for the word thirsty in baby sign language with the following description and video.
Form the signed number one (1). Touch the index finger to the side of the mouth. Lower the hand to the chest.
Porpora, Tracey. 2011. The complete guide to baby sign language: 101 trips and tricks every parent needs to know. Ocala, FL: Atlantic Publishing Group, Inc.