71.   The condition of corn and soybean fields declined last week as extreme heat depleted soil moisture, according to the U.S. Department of Agriculture.

72.   The diseases are not destroyed by extreme heat or cold.

73.   The death of Minnesota Vikings offensive tackle Korey Stringer was the latest incident which calls into question the wisdom of conducting multiple daily practices in extreme heat and humidity.

74.   The extreme heat caused by the constant friction of the applied brake can get the drum hot enough to warp.

75.   The corn crop is particularly vulnerable to extreme heat as it enters its pollination phase.

76.   The extreme heat will continue Wednesday across the Southeast and southern plains as burly high pressure remains steadfast.

77.   The extreme heat can hurt the machine, and the ride also is much more harsh.

78.   The extreme heat in Texas has kept the grass from growing, which has kept mowers in the garage and Reeves shy of work.

79.   The initiative has enlisted Spanish-language public service announcements on Mexican radio and television to warn potential immigrants about the dangers of extreme heat.

80.   The health consequences of extreme heat vary from one population to another.