The Potomac River in Washington recorded a high temperature of 94 degrees Fahrenheit (34 degrees Celsius) over the weekend.
The United States experienced a dramatic rise in heat during the weekend, with temperatures in major cities including New York, Philadelphia and Washington rising threefold.
The Potomac River is the wildest river in the world that flows through a heavily populated area. On its way from the mountains to the ocean, it runs through West Virginia, Maryland, Virginia and the United States capital, Washington, DC.
According to the US Geological Survey, the temperature on Sunday exceeded the previous records this year by half a degree Fahrenheit near the slopes of Little Falls, culminating at 93.7 degrees Fahrenheit, four feet (1.2 meters) from the shore, midway between the surface and the bottom.
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