Midwest residents woke Tuesday to the whir of fans and air conditioners, the soundtrack to an unusually intense heat wave enveloping most of middle America and slowly spreading eastward. From Texas to the Dakotas, and east to Illinois and Indiana, temperatures and humidity levels soared on Monday and were expected to remain high through at least the end of the week, by which time forecasters say the East Coast will get to share the misery. Seventeen states issued heat watches, warnings or advisories on Monday, when the heat index easily surpassed 100 degrees in many places, including 126 in Newton, Iowa, and 119 in Madison, Minn. Rylea Williams, 15 months, plays with a garden hose Wednesday, July, 13, 2011, in Salina, Kan. Alan Perez, from Wilmington, N.C., seeks shelter from the sun under an umbrella while holding a stop sign to close a road for debris removal Tuesday, July 19, 2011 in Joplin, Mo. Despite a recent heat wave, crews continue to clean up nearly two months after an EF-5 tornado destroyed much of Joplin. Madison Lopes, 5, cools off under a fountain at Peabody Park in Memphis, Tenn., on Tuesday, July 12, 2011. Temperatures in the area surpassed 100 degrees.