The unseasonable warmth felt across parts of Europe this week will continue for several more days.
As a storm system spins to the northwest of Spain, a warm southeast flow will keep temperatures 6-9 degrees C (10-15 degrees F) above normal.
In London, high temperatures ranged from 17-20 C (63-68 F) Monday through Wednesday. A negative side to the warm southeast flow is that air pollution has increased in southeast England.
The combination of light winds, pollutants from Europe and Saharan dust particles have lead to high levels of air pollution across southeast England. Air pollution will remain high through Thursday, prompting authorities to caution against strenuous outdoor activities.
Image of Tower Bridge, courtesy of Thinkstock.
High temperatures will reach 18-20 C (64-68 F) on Thursday and Friday before cooler air arrives for the weekend along with showers.
While London will have to deal with occasional showers, Paris will remain largely dry through Friday with highs ranging from 19-22 C (66-71 F).
Image of the Eiffel Tower at sunset, courtesy of Thinkstock.
While temperatures will remain warm on Saturday, the threat of showers will increase in Paris.
Unseasonable warmth has prevailed across much of Germany since the weekend with temperatures reaching at least 16 C (60 F) each day in Berlin.
Dry weather and more sunshine are expected on Thursday as temperatures climb to around 19 C (66 F).
A cold front arriving on Friday will bring more clouds and also knock high temperatures down to near 16 C (60 F).
The second half of the week looks to be noticeably cooler and less humid in the Chicago area.
Tropical Depression Two has formed in the Atlantic and could become the next tropical storm of the season by midweek.
Warm and humid air in place over much of the Northeast at midweek will contribute to the risk of drenching, gusty and locally severe thunderstorms on Wednesday.
After temperatures briefly climb to typical midsummer levels, another cooldown will roll into the Midwest and expand to the East for the last part of July.
With the recent heat fading away, more relief will greet the Northwest by midweek in the form of rain.
Canton, IL (1975)
A tornado ripped through a 3-block section of downtown, killing 2 people, injuring 75 and creating $5 million damage. A 15-foot wooden plank was driven through an auto engine block, splitting the front of the car in two. The woman driving was not injured. National Guardsmen were called in to prevent looting.
Columbus, OH (1979)
This is the first year in 101 years of record keeping at Columbus in which the temperature has not reached 90 degrees by July 23rd.
Hurricane Delores, west of Baja California, causes high surf along the Southern California coast.