This project assesses the efficacy of a coordinated dehydration prevention program using a system (CYCORE) that links home-based monitoring sensors--that collect biometric and self-reported symptom data--to a cyber-infrastructure (CI) and sends these data daily to the patient's healthcare team, who in turn monitor the patients for early signs of dehydration and provide earlier clinical intervention, when needed. The project is based on our successful pilot study that evaluated the feasibility of CYCORE use in HNC patients and with their radiology healthcare team. The patients reported high acceptability of the system, while clinicians perceived the data as valuable and useful in providing additional information regarding patient's at-home dehydration status. We will randomize a total of 192 HNC patients receiving RT at MD Anderson Cancer Center (MDACC) to either standard care or CYCORE + standard care (CYCORE). We hypothesize that patients randomized to CYCORE will experience fewer hospitalizations and ER admissions (and fewer associated costs) due to dehydration compared with patients in the standard care arm.