 After that, the downtown area was renovated, while preserving the many century-old buildings that remained standing.According to the United States Census Bureau, the city has a total area of 35.317 square miles, of which 21.037 square miles are land and 14.280 square miles, or 40.43%, are covered by water.Wylie is part of the subtropical region, with hot, dry summers and cold, mild, rainy winters.