OKLAHOMA CITY (KFOR) — Emergency crews responded to a deadly crash along Lake Hefner Parkway near Grand Boulevard early Thursday afternoon. Car fire on Lake Hefner Parkway. Image KFOR. Car fire on Lake Hefner Parkway. Image KFOR. According police, one person has died after their car hit a wall and caught fire near Lake Hefner. Oklahoma Department of Transportation traffic cameras show southbound traffic along SH-74 is backed up past West Hefner Road. Traffic backed up in the southbound lanes of SH 74 after a deadly crash along Lake Hefner Parkway near Grand Boulevard. Image courtesy ODOT. Drivers are advised to avoid the area or expect major delays. The cause of the crash is still under investigation.