CHICAGO (AP) &#8212 In a race run in scorching heat that left one man dead, Kenya’s Patrick Ivuti won the Chicago Marathon by a fraction of a second Sunday. More than 300 runners were taken to hospitals because of heat-related ailments.

The 88-degree heat and sweltering humidity were so draining that organizers shut down the second half of the course four hours after the start.

Ivuti leaned at the finish line to edge Jaouad Gharib of Morocco by 0.05 seconds. Ethiopia’s Berhane Adere rallied to successfully defend her women’s title.

Chad Schieber of Midland, Mich., 35, collapsed while running on the South Side and was pronounced dead shortly before 1 p.m. at a Veteran’s Affairs hospital, the Cook County medical examiner’s office. An autopsy was scheduled for Monday.

These were record temperatures for the Chicago Marathon, topping the mark of 84 degrees in 1979. Runners were diverted to the starting area, where they were provided with medical attention and cooling misters. Shortages of water and energy drinks were reported along the 26.2-mile route.

About 10,000 of the 45,000 registered runners chose to not race in the heat despite more mist stations, cooling buses and water-soaked sponges, while another 10,934 started but didn’t finish, officials said.