UMATILLA COUNTY, OR (WCMH) — Firefighters in Oregon are reminding people that it can be dangerous to plug your space heater into power strips.

The Umatilla County Fire District posted a now-viral photo to its Facebook page November 26 that shows the aftermath of a space heater plugged into a power strip.

“We just wanted to remind you that you should NEVER plug a heater into a power strip. These units are not designed to handle the high current flow needed for a space heater and can overheat or even catch fire due to the added energy flow,” the Facebook post reads.

The picture, which shows the melted remains of a power strip, has been shared more than 21,000 times.