Like much of the Midwest, Chicago will be feeling cooler temperatures that resembles fall more than the peak of summer for the next several days.
As part of the summertime polar vortex, the change in temperature will cause people to reach for jackets instead of sunscreen.
The chill will bring below-average temperatures in the 70s.
The usual average is near the 85 F mark for this week though temperatures could be more than 10 degrees below the norm. Into early next week, temperatures should be back on track in the low 80s.
Overnight temperatures will rise from the mid-50s to the mid-60s by the weekend.
Skies will be cloudy with more sunshine appearing in time for weekend plans.
In addition to the cooler air, AccuWeather meteorologists are warning of waterspouts developing near the shore.
With the rise in temperature, early next week could bring back the more typical summer humidity as well.
Smoke created hazy, orange views in Los Angeles on Saturday as the Sand Fire continued to rage less than 40 miles away from the city's downtown.
Darby will continue to deliver locally heavy rain, gusty winds and rough surf to Hawaii into early Monday. But the tropical storm will provide long-term benefits.
Gusty thunderstorms will target the northeastern United States on Monday, but will fail to sweep away the baking heat wave gripping the region.
Dangerous heat will surge northward and send temperatures soaring across the northwestern United States during the final week of July.
Downpours will spread from the lower Mississippi Valley to eastern and central Texas early this week, delivering needed rain but raising the concern for flash flooding.
With the heat of summer comes many unwelcomed pests, including mosquitoes, ants, fruit flies, wasps and stink bugs, into outdoor spaces and homes.
Southern California (1996)
7-10 foot swells on the beaches from a powerful storm south of Tahiti. Life guards had to make more than 500 rescues due to the rough surf.
Los Angeles, CA (1891)
Heat wave; 109 degrees.
Off New England (1956)
The Andrea Doria, weighing 29,000 tons was rammed by Swedish liner Stockholm, weighing 12,644 tons, near Nantucket Lightship, MA. Andrea Doria was moving westward through fog while the Stockholm moving eastward in clear weather. Andrea Doria emerged from the fog across bow of Stockholm. Andrea Doria sank 12 hours later; 51 killed by impact or drowned before or during rescue attempts.