"From the middle of the week in the Moscow River, the temperature will be above 20 degrees, you can swim," RIA Novosti quoted Vilfand.
According to him, in the city, the water can be warmer due to drains.
He clarified that the effluents are treated, but their temperature is higher than natural values.
Earlier it became known that from June 17 in the Central Federal District (CFD), the ultraviolet radiation of the sun will rise to dangerous levels.