Reading that the forecast calls for 90 degrees is one thing. Standing in Newark at midday on a summer Tuesday is another — sun beaming down, a heat advisory pinging on your phone (which keeps overheating), sweat dripping down your forehead so much that wiping it away with a towel provides only seconds of relief. Brick City residents live in a place that new climate findings say will not only suffer from hotter days — worsened by human-caused climate change — but will be at the epicenter of the worst heat effects nationwide. As Newark officials warned the local heat index would soon surpass 100…