The bar chart illustrates the number of heat-related illnesses per 100,000 sports events among high school students in central US states, while the line graph shows average monthly temperatures in one of these states.
Overall, the number of illnesses exhibits a remarkably stable pattern (stays very stable) for most of the year, with fewer than 10 cases recorded monthly. However, it witnesses an abrupt surge (rises suddenly) in August, reaching nearly 70 cases, before tapering off (gradually decreasing) in September and October. By contrast, the temperature graph demonstrates cyclical fluctuations (goes up and down repeatedly), peaking in midsummer and falling during winter months.
In detail, illnesses remain virtually unchanged (almost no change) from January to July, averaging fewer than 5 cases. In August, however, the figure skyrockets to unprecedented levels (rises very fast / record high), coinciding with the hottest period of the year when temperatures surge to their highest point (rise to the top). Following this, illnesses plunge sharply (fall sharply) to around 15 in September and then contract steadily (shrink steadily) towards the end of the year.
Temperature trends show that the green line (representing highs) climbs gradually over time (rises slowly) from January, reaching about 90°F in July and August, before spiraling downwards (falling quickly and continuously) to below 40°F in December. The blue line (representing lows) follows a largely predictable curve (changes in a predictable way), rising to around 70°F in midsummer and then bottoming out (reaching the lowest point) at about 10°F in winter.
Comparatively, the spike in illnesses in August is significantly higher than (much higher than) any other month, suggesting a strong correlation with extreme heat. Meanwhile, during the peak years (highest point) of temperature, illness rates outstrip all other categories (are higher than all others), whereas in cooler months they remain comparatively stable (stay fairly stable).