The air surrounding the globe has weight and, as a result, produces pressure on the surface of the earth, on all surrounding objects. This pressure is expressed in millimeters of mercury and depends on the height of the area above sea level and on air temperature. Low atmospheric pressure or a cyclone causes oxygen starvation in the body. According to him, due to lower atmospheric pressure, people can feel apathy and depression. Some may experience headaches, dizziness, nausea and weakness, and palpitations. More info you can find here https://world-weather.info/forecast/usa/dallas_1/