Major Incidents | Slideshow

EMS Response to Blackhawks Parade

01 / 05

Blackhawks Stanley Cup Parade Hockey

Five ambulances arrive on the corner of Michigan Ave. and Monroe to treat Chicago Blackhawks fans for apparent heat related issues before a parade celebrating the NHL hockey club's Stanley Cup championship, Thursday, June 18, 2015, in Chicago. (AP Photo/Charles Rex Arbogast)

02 / 05

Blackhawks Stanley Cup Parade Hockey

Medical personnel treat Chicago Blackhawks fans for apparent heat related issues on the corner of Michigan Ave. and Monroe, before a parade celebrating the NHL hockey club's Stanley Cup championship, Thursday, June 18, 2015, in Chicago. (AP Photo/Charles Rex Arbogast)

03 / 05

Blackhawks Stanley Cup Parade Hockey

Chicago Blackhawks' fans occupy the corner of Michigan Ave and Monroe before the parade to celebrate the Blackhawks' Stanley Cup win over the Tampa Bay Lightning, Thursday, June 18, 2015, in Chicago, Ill. (AP Photo/Charles Rex Arbogast)

04 / 05

Blackhawks Stanley Cup Parade Hockey

Medical personnel treat Chicago Blackhawks fans for apparent heat related issues on the corner of Michigan Ave. and Monroe, before a parade celebrating the NHL hockey club's Stanley Cup championship, Thursday, June 18, 2015, in Chicago. (AP Photo/Charles Rex Arbogast)

05 / 05

Blackhawks Stanley Cup Parade Hockey

Chicago Blackhawks' fans occupy the corner of Michigan Ave and Monroe before the parade to celebrate the Blackhawks' Stanley Cup win over the Tampa Bay Lightning, Thursday, June 18, 2015, in Chicago, Ill. (AP Photo/Charles Rex Arbogast)