21.   But down the stretch, Hingis was unable to keep her legs and game moving in the right direction in the extreme heat.

22.   But even in extreme heat, scientists found it will last three to four hours on the surface of asphalt, Mathis said.

23.   Cetia specializes in making parts that can tolerate shock and vibration, while Matrix produces parts meant to function in extreme heat and cold.

24.   Corn and soybeans plunged as forecasts called for ideal Midwest growing weather, easing concern that extreme heat would harm fledgling crops.

25.   CORN AND SOYBEANS GAIN Corn and soybean futures prices fell sharply following forecasts for ideal Midwest growing weather, easing concern that extreme heat would harm fledgling crops.

26.   Dehydration that stems from extreme heat can prove fatal.

27.   Down the stretch in the third set, Hingis was unable to keep her legs and her versatile game moving in the right direction in the extreme heat.

28.   Drought and extreme heat have gripped the region in recent weeks.

29.   During thermal vacuum testing, the spacecraft s hardware and software systems are exposed to alternate cycles of extreme heat and extreme cold simulating the harsh environment of space.

30.   Extreme heat and humidity will continue to stifle the Deep South Friday.