Battle Creek's Field of Flight is welcoming thousands of visitors despite temperatures expected to climb into the 90s during the five-day event featuring air shows, hot air balloons and fireworks.Safety Precautions for Extreme HeatSandy Sinkler, who has volunteered at Field of Flight for nearly 30 years, says organizers are taking extra precautions for the heat."Once it gets going and you just look out here, it's just going to be so full of peop…