Psak of Hagry"s revealed: "Allowed to phone a relative on Yom Kippur"
Chairman of Yad Sarah revealed an interesting psak which he heard from Hagry"s Eliashiv zt"l. "When a patient in danger asked the distress center to update a Jewish relative, it is allowed to let him know even on Yom Kippur, so that he won't become perturbed"
Moshe Weissberg, Behadrey Haredim
25.09.12