 The Baltimore City Health Department says the hottest time of the day is between 11 a.m. and 4 p.m. That is why Manny Gonzalez from Baltimore City Recreation and Parks says public pools are adjusting their schedules. We're on code red schedules. First session will be two hours, 11 a.m. to 1 p.m. The last session will be 6.30 to 8.30 p.m.