About 15 inches of rain hit southwestern Seoul on Monday, according to the Korean Meteorological Administration, and seven people were missing.
Isolated heavy downpours remain possible. They may be more widespread tomorrow.
London and Paris are forecast to reach 90 degrees or higher late this week.
As water demand has grown, researchers say a lack of rain and mismanagement has led to one of the worst droughts in the northern half of the country.
The heat index heads for near and above 100 today, with a few storms possible later today, and an even better chance of storms tomorrow.
Localized flooding is possible in the most intense activity. Expect low to mid-90s and more storm chances on Tuesday.
In recent years, every time three or more people have been killed by a lightning strike in the U.S., they’ve all made the same critical mistake.
Parts of northern Illinois were also under flash flood warnings Monday.
Big drop in heat and humidity coming later in the week
The blast killed a retired couple from Wisconsin and a bank official from California. A woman raising money for refugees was badly wounded but survived.
Storm chances will be less today and tomorrow, but the heat and humidity just won't quit.
After the chance of a few storms today, Monday looks to have the lowest chance of storms and Wednesday the highest.
The hottest place on earth is soaked after record rainfall, trapping visitors, staff and cars for hours.
Scattered storms with heavy downpours are likely this evening.
Some storms late today could contain flooding downpours.
Four people had been critically hurt in the strike in Lafayette Square. One remains in critical condition, police said.
Very heavy rainfall is possible with any storms. Hot and muggy this weekend.
Images after the tornado show dramatic damage, collapsed homes and shredded walls across an area of the Maryland island that’s home to just over 200 people.
A flood watch is in effect Friday afternoon and evening.
What you may not know about what happens when lightning strikes, and how to stay safe in a thunderstorm.
Strong storms this afternoon may bring flooding downpours, damaging winds and hail.
Lightning in the United States was below average overall, with unusually high activity in the Southwest and Gulf Coast.
Researchers say the water, enough to fill 58,000 swimming pools, may temporarily warm the climate and deplete stratospheric ozone.
An increased chance of rain may help lower temperatures somewhat Friday. It's still very soupy, though.
The four adults were found at the center of the Lafayette Square just before 7 p.m. Thursday.