OKLAHOMA CITY: The summer of 2023 may be drawing to a close — but the extreme heat is not: More record-shattering temperatures — this time across Texas — are expected Saturday and Sunday as the U.S. continues to bake.Highs of 109 degrees Fahrenheit (42.8 degrees Celsius) forecast for Saturday and 110 F (43.3 C) on Sunday in Dallas would break the current record of 107 F (41.7 C) each day, both set in 2011, and would come after a high of 109 F (42.8 C) on Thursday broke...