need more info: tank size, type of cichlids, fiteration, lighting, room temp, is sun light hitting the tank? My 220 with a sump runs 84 in the summer and 80 in the winter. The pump keeps it at that temp. When I ran two pumps the temp would hit 86 in the summer.
Last week was HOT on the east coast, at least where I am. The temp being ok depends on the fish. Most central and south amercian cichlids are fine with that, though some Thorichthys do not do well over 78. Frontosa don't really like temps that high either. So, it depends on which cichlids you have.