A woman was found dead — with her pants down — in a Brooklyn parking lot early Saturday, cops said.

The unidentified woman may have died of exposure and hypothermia in the below-freezing temperatures, police said. The victim, 39, had no obvious signs of trauma on her body when she was found just before 6 a.m. in the lot on East 21st Street near Ditmas Avenue in Flatbush.

The city Medical Examiner will determine her official cause of death.

The city has been locked in a brutal cold snap for much of the week.