Thermite Burns is a black/death metal band from Redlands, California, formed in 2024, combining the icy aggression of black metal with death metal's brutality into a scorched, ferocious sound. Their name reflects the incendiary nature of their approach — fast, caustic, and burning with intensity.

Thicc is a Los Angeles death metal act formed in 2026, bringing a confrontational name and presumably equally confrontational riffing to the crowded Southern California extreme metal scene. As one of the newest bands in the LA underground, they are just beginning to carve out their identity.

Thieves is a California grindcore and crust punk act formed in 2013, channeling the raw, politically charged fury of crust into a grindcore format that is brief, loud, and absolutely unsparing. Operating without a fixed city listing, they embody the nomadic, anti-establishment spirit of the crust underground.

Berkeley, California's Tholus have been developing their progressive death metal vision since 2007, fusing technical death metal's precision with progressive music's compositional ambition in a Bay Area scene with plenty of both traditions to draw from.

Burbank, California's Thomas Warner is a solo melodic death metal project that has been active since 2013, channeling the genre's Scandinavian influences through a Southern California lens with carefully crafted arrangements.

Ventura, California's Thornlord emerged in 2024 blending death and black metal into a ferocious hybrid that draws from both the brutality of death metal and the cold, malignant atmosphere of black metal. The coastal California origins add little warmth — the band's sound is decidedly grim.

Los Angeles blackened thrash act Thorns of Sin formed in 2015 and draws from the same Southern California tradition that produced many crossover-influenced metal acts, mixing black metal's cold malice with thrash's relentless velocity. The result is lean, aggressive, and uncompromising.

Auburn, California's Those Who Live in Death formed in 2025, making them one of the newest entries in the American black metal underground. Drawing from the genre's traditional arsenal of blast-beaten fury and bleak atmosphere, the project is still in its nascent stages but arrives with a name that signals death-fixated intent.

Sebastopol, California's Thought Vomit have been dealing in Bay Area-influenced thrash metal since 2016, channeling the Northern California tradition of speed, riff density, and unhinged energy that defined the genre's American peak. Their name announces the aesthetic: raw, unfiltered, and relentlessly aggressive.