In this May 31, 2013, file photo, a tornado forms near Banner Road and Praire Circle in El Reno, Okla. Longtime storm chasers Tim Samaras, his son Paul and colleague Carl Young were killed Friday when a powerful tornado near El Reno, Okla., turned on them as they were conducting research.OKLAHOMA CITY - Four more deaths are being attributed to the tornadoes and flooding last week in Oklahoma.
The Oklahoma medical examiner's office said Monday that 18 people died as a result of the powerful storms that swept through the Oklahoma City area late Friday. The previous death toll had been 14.
Spokeswoman Amy Elliott says the dead include 12 adults and six children. Seven remain unidentified.
The National Weather Service says five tornadoes touched down Friday, along with heavy rain that caused widespread flooding. Some victims have been difficult to find because their bodies floated away.
Among those killed were storm chasers Tim Samaras, his son Paul, and colleague Carl Young. They were killed in the tornado that struck El Reno.
The Oklahoma City Fire Department says a 34-year-old woman remains missing.