Katy Perry’s hit song about Humboldt summers.

Protect your grow, bro.

Morning temperatures are expected to drop into the 30s on Thursday and Friday in areas of Trinity County.

Chilly temperatures are also forecast for bordering regions of Humboldt County, especially in the Dinsmore area.

“Patchy frost will be possible,” Eureka’s National Weather Service office stated on social media. “Protect pets and sensitive plants.”