Yahoo Sports reports: Paris police authorities requested Friday the cancelation of this weekend's Diamond League track and field meeting in the French capital because of the historic heat wave gripping the country and stretching emergency services. Citing the exceptional heat that has affected Paris since June 21, the police prefecture said it had asked organizers of Sunday’s meet, and other events scheduled this weekend including a music festival and a Pride march, to cancel. The prefecture said it would be forced to comply with the order if they don't agree voluntarily as emergency services need to concentrate their efforts on protecting the most vulnerable people.