[4] During 2015, Hernández went to a doctor's checkup following a chest injury; x-rays and further testing revealed she had lung cancer.
At first she showed some improvements and she briefly returned to co-anchor Noticentro al Amanecer, but was re-diagnosed during the summer of 2018, this time with liver cancer.
She flew to Tampa, Florida, for monthly treatments and further testing at the H. Lee Moffitt Cancer Center & Research Institute.
[6] Hernández's funeral was partly held at the Palacio de Recreación y Deportes coliseum in her native Mayagüez, Puerto Rico.
[8] Governor Ricardo Rosselló expressed that "(he was) lamenting the sad news of the passing of Keylla Hernández.