Complex sentence: While there had been an apparent lull in cases in 2014, by August 2015, after the rainy season brought a spike in the number of cases, more than 700,000 Haitians had become ill with cholera and the death toll had climbed to 9,000.
Split into simpler sentences: While there had been an apparent lull in cases in 2014, by August 2015 the rainy season brought a spike in the number of cases. At that time more than 700,000 Haitians had become ill with the disease and the death toll had climbed to 9,000.