Severe thunderstorms halted numerous outdoor events this weekend, including Lollapalooza and the Netherlands' Dicky Woodstock 2012.
Lollapalooza was evacuated Saturday after severe storms descended upon the Chicago area.
Tens of thousands of people were told to leave Grant Park about an hour before the storms, and were instructed to seek shelter in underground parking garages designated for emergency evacuations.
The evacuation caused "mass chaos," one concert-goer tweeted. Another twitter user nicknamed the storm "lollapocalypse."
The festival was shut down for just under three hours. No injuries were reported as a result of the storms.
Dicky Woodstock 2012 may have been even more chaotic as a tent collapsed during severe thunderstorms Aug. 4, injuring 13 people and sending attendees running for cover.
11 of the injured people have been released.
A video posted by YouTube user i2Them2 captures the severity of the storms.
Severe thunderstorms with the risk of a few tornadoes will advance eastward across the northern Plains and Upper Midwest into Friday.
A dangerous outbreak of severe storms will strike the northern High Plains and Canadian Prairies on Wednesday.
Join us on Thursday for AccuWeather LIVE as we will discuss the debate of climate change and hurricane frequency and the top five things you need to know about summer weather.
A hot and humid weekend is shaping up for Chicagoland just in time for the official start of summer, while severe thunderstorms fire nearby to the north.
Tropical Storm Barry formed over the southwestern Gulf of Mexico and may hit the Mexico state of Veracruz Thursday.
A tornado touched down at Denver International Airport as a severe weather system moved through the area.
New Brunswick, NJ (1835)
Great New Brunswick Tornado; 5 dead, 17-mile path through the center of town; in all, 145 buildings were damaged. This is the worst tornado catastrophe in New Jersey history to date.
Central Illinois (1964)
19th-20th) Hail as large as grapefruits battered more than 50 counties, causing crop and property damage totalling $9.2 million.
Southeast China (1932)
Hailstorm in Hunan Province killed 20 people and injured thousands of others.