Yesterday was so hot and sticky the National Weather Service issued a heat advisory, which it does whenever the heat and humidity combine to make the temperature feel like 95 degrees or more. The high temperature was 92, and today's expected to get even grosser, with a high of 93 expected. Some combination of heat and mental illness may have driven 27-year-old Joshua Knee to dive into the East River at 72nd Street yesterday; Firefighter Justin McNally, who helped fish Knee out of the swift-moving soup, tells the Daily News, "I think he was just going for a swim." Knee was wearing swim trunks, and is now being held in the psychiatric ward at New York-Presbyterian Hospital Weill Cornell.



