“The city notice (of the heat plan) is reprinted below, but contains no information from the Department of Correction," the letter said. "When people are not in air-conditioned areas, the city must provide free access to cool showers and ice to all persons confined in non-air-conditioned units. Under no circumstances should any person in the city be locked into a room without access to ice baths, cold water showers, potable drinking water or air conditioning this weekend.”