Seattle Mariners relief pitcher Andres Munoz stands in silhouette as he signs autographs in the hot sun before a baseball game against the Chicago White Sox Wednesday, Aug. 23, 2023, in Chicago. Heat indexes are expected to soar this week in the central U.S. and are expected to reach levels “dangerous to the average person,” according to Alex Lamers of the National Weather Service's Weather Prediction Center. (AP Photo/Charles Rex Arbogast)