Lisle Township recently posted a mosquito status report for September.
The report indicated much of the Chicago area was impacted by three to four major floodwater mosquito-annoyance periods.
"The above-normal temperature pattern, including three days in the 90s and 15 days at 80 degrees or above, created ideal conditions for the mosquitoes to be a significant factor," the report said.
As of Sept. 29, a total of 48 states and the District of Columbia reported West Nile virus cases in people, birds or mosquitoes. Overall, 1,028 human cases of West Nile virus have been reported to the Centers for Disease Control and Prevention (CDC), including 54 fatalities. Of these, 638, or 62 percent, were classified as neuroinvasive disease (such as meningitis or encephalitis) and 390, or 38 percent, were classified as non-neuroinvasive disease, the report said.
The report said mosquito activity likely will cease after the first major frost in Northern Illinois.
The complete report can be viewed at http://www.lisletownship.com/wp-content/uploads/2015/10/Lisle-Township-September-2015-Monthly-Report....