Over the weekend, residents of Sri Lanka found themselves without power during a heat wave, but it wasn’t because of the oppressive temperatures. The energy minister for the island nation reported that the power outage was initially caused by a monkey when it came into contact with a grid transformer.

According to The Guardian, the nation’s Energy Minister believes the entire country lost power after a monkey came into contact with a grid transformer. Engineers worked quickly to restore power to critical facilities like hospitals, but many households remained without electricity overnight.

Sri Lanka has grappled with a struggling energy grid for years, and monkeys are making it worse. On Sunday at around 11:00 local time (12:30 AM EST), a nationwide blackout forced its 22 million residents to either turn to personal generators,

Officials in Sri Lanka said a monkey in the wrong place at the wrong time was to blame for a power blackout that affected the entire nation.

Electrical grids are built to resist human interference and natural disasters. But turns out, Sri Lanka's power grid wasn't ready for what this little monkey had in store for it.