Cyclist Dies and Heat is Expected Cause

A 20 year-old cyclist was biking at 11:15am yesterday on a path that runs between the Oxon Hill Farm and the National Harbor when he went into cardiac arrest, causing him to go unconscious and fall off his bike. A bystander administered CPR until paramedics arrived and the cyclist was then taken to Fort Washington Hospital Center, where he was pronounced dead shortly after arriving.

The cause of death will not be determined until an autopsy is performed,
but paramedics reported that temperatures in the mid 90’s and humidity
at 43 percent more than likely played a role in the death.

The same story is reported here, here and here. If you do go biking in the heat, make sure to bring water and pay attention to signs of heat exhaustion in yourself and others.