(Portland, OR) -- First responders are warning residents to take caution in cold waters. AMR lifeguard Leah Gordan tells KATU-2 that jumping into especially cold water could lead to cold shock, causing the body to freeze up. That could lead to drowning risks. Officials say that despite the warming weather and current hot streak, natural bodies of water in the area remain chilly. The waters of the Clackamas River at High Rocks were running between 53 and 58 degrees Fahrenheit yesterday.