The death toll from a weeklong heat wave rose to 56 Saturday, officials said. Forest fires blamed in part on the heat raged across Greece and killed four people, including three British tourists.

Temperatures topped 104 degrees Saturday in Athens and hit 109 degrees in the northern Greek city of Larissa, the National Weather Service said.

The National Center for Emergency Aid said more than 3,600 people have been admitted to hospitals, and hospital officials reported 25 more heat-related deaths Saturday.

On the western resort island of Cephalonia, a forest fire burned out of control for a second day, leaving four people dead, including a woman from London and her two daughters, police said.