A nuclear power plant is situated on the bank of a river. The power plant produces 200 megawatts of power and releases 1.5 × 10^13 joules of heat per day into the river through the cooling system. If the flow rate of the river is 5.0 × 10^8 kilograms per second and the specific heat of water is 4.2 × 10^3 joules per kilogram degree Celsius, what is the maximum temperature increase of the river water due to the cooling system, in degrees Celsius to the nearest integer?