McHenry County is expected to see temperatures in the high 90s on Friday, according to the National Weather Service.
A heat advisory will be in effect in the county from noon Thursday to 11 p.m. Friday, according to the weather service.
During the advisory, temperatures will range from 92 to 98 degrees Fahrenheit, with the hottest temperatures on Friday. The maximum heat index, which takes humidity into consideration, will range from 101 to 109 degrees, according to the weather service.
Temperatures like this could lead to heat-related illness, especially for those without air conditioning, elderly, small children and pets. The National Weather Service advises residents to drink plenty of fluids, stay in an air-conditioned room, avoid outdoor activity, wear lightweight and loose-fitting clothing and check up on relatives and neighbors.
There is a limited thunderstorm risk between Thursday and Sunday, with limited flooding risk on Thursday. Thursday through Saturday has a significant excessive heat risk and an elevated excessive heat risk on Sunday, according to the weather service.
Warm temperatures overnight will offer little relief, according to the service.
Some municipalities will offer cooling centers for residents in need.
McHenry County Sheriff’s Office announced the following locations as cooling centers during office hours only, unless otherwise specified.
Ganek Municipal Center, 2200 Harnish Drive
Harvard Senior Center, 6817 Harvard Hills Road
Mercy Health Harvard Hospital, 24 Grant St. 24 hours
Huntley Municipal Complex, 10911 E. Main St. 24 hours. Use Red Phone in Lobby.
LAKE IN THE HILLS
Irv Floress Safety Education Center,
1109 Crystal Lake Road. Please call in advance at 847-658-5676
Lake in the Hills Police Department, 1115 Crystal Lake Road. If needed, call in advance at 847-658-5676.
Lakemoor Police Dept., 28581 W. Route 120
Lakewood Village Hall, 2500 Lake Ave.
RedTail Golf Club, 7900 RedTail Drive
McHenry City Hall, 33 S. Green St
McHenry Township, 3703 N Richmond Road
Port Barrington Community Room, 75 S. Circle Drive
McHenry County Housing Authority, Old Firehouse Assistance Center, 120 W. South St. This center is for people who are homeless only.
McHenry County Government Center, 2200 N Seminary Ave.