While summer is well underway, the season so far has brought a mix of hot days and some cooler periods, but get ready: an intense heat surge is coming soon.
The hottest conditions of the year are expected early next week, with heat index values surpassing 100 degrees and remaining elevated through at least Thursday. It’ll mark a drastic jump from the weekend, with values rising from around 91 degrees on Sunday to near 104 degrees Monday, according to the NBC 5 Storm Team’s latest forecast.
The National Weather Service is warning about the dangerous heat as humid conditions persist and heat indices rise, marking the first heat wave of the summer.
[3:25 PM CDT Friday 6/26/2026] The first bona fide heat wave of the summer is on the way next workweek. Take steps to prepare for the heat and plan ahead if you have outdoor activities scheduled! #ILwx #INwx pic.twitter.com/F2JGsJRBMp
— NWS Chicago (@NWSChicago) June 26, 2026
The most extreme conditions will likely arrive Tuesday, so make sure to stay hydrated, prepare to limit time outdoors and be aware of signs of heat-related illness such as heat exhaustion and heat stroke.
NBC 5 Storm Team Meteorologist Alicia Roman shared a map of expected peak conditions then, showing parts of the Chicago area could experience “major” or “extreme” heat, with the hottest conditions likely in the northern and western suburbs.
Actual temperatures for the week won’t quite reach 100 degrees, but they won’t be far off. Readings will sit in the 90s through Sunday, with highs climbing to around 97 degrees on Wednesday.
While nighttime relief might be expected, it’ll likely be limited in or near Chicago, as heat indices remain in the 90s. Elsewhere, temperatures will be slightly cooler overnight, with lows sitting in the 70s to around 80 and heat index values in the mid 70s to low 80s.
Some relief arrive may come in the form of thunderstorms that arrive mid-to-late week, though the greatest chance isn’t until Friday.
The building heat wave won’t just affect the Chicago area. A large swath of the nation is set to experience similar conditions, with much of the eastern United States likely seeing the hottest temperatures of the year.
Feels-like values will exceed 100 degrees, stretching east from Dallas to New York City, north to Minneapolis and south to Florida.
Stay tuned to the NBC 5 Storm Team for important updates and crucial safety reminders you need to know amid the brutally hot conditions.
from NBC Chicago https://ift.tt/rLbmpD7
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