31.   Officials worry that searing summer temperatures and a lack of hygiene could cause disease to set in.

32.   Officials fear summer temperatures and a lack of hygiene could prompt diseases.

33.   Ozone is produced when pollutants from cars, factories and power plants combine with sunlight and high summer temperatures.

34.   Summer temperatures have led to sudden snow slides on the higher peaks, especially in the afternoons.

35.   The courtyard is ringed by classrooms which had their windows open because of the warm summer temperatures, allowing the tear gas to seep in.

36.   The courtyard is ringed by classrooms that had their windows open because of the warm summer temperatures, allowing the tear gas to seep in.

37.   The first blazes started late last week in rural areas amid sweltering summer temperatures.

38.   The first blazes started in rural areas amid sweltering summer temperatures.

39.   The Northwest has adequate supplies even with unusually severe summer temperatures as were recently experienced.

40.   While central Europe began the year with flooding, much of the continent sweltered in record summer temperatures.