2013–2014: Early years The Villarreal Vélez sisters were raised in
Monterrey, and all received training on piano and various instruments at an early age. Thanks to encouragement from their parents and often playing the video game
Rock Band, the sisters decided to pursue rock music. Daniela and Paulina selected guitar and drums as their primary instruments, respectively. After the youngest of the three, Alejandra, selected bass guitar as her primary instrument at about age 7, the sisters decided to form a
power trio in 2013. They learned to play rock songs and posted videos of their performances to
YouTube. In 2014, 12-year-old Paulina was profiled in the women's drumming publication
Tom Tom Magazine. The band first gained widespread notice later in 2014 when, at ages 9 through 14, their YouTube video in which they performed
Metallica's "
Enter Sandman" went viral among rock fans, eventually earning more than 26 million views. The video received attention from Metallica guitarist
Kirk Hammett, who offered particular praise for Paulina, saying, "The drummer kicks maximum ass!"
2015–2020: As independent artists Due to the recognition gained from their "Enter Sandman" video and encouragement from Alejandra's bass teacher (Pablo González Sarre of
Los Claxons), The Warning decided to seek a record deal and develop their own songs. The band raised money through a
GoFundMe appeal to record the six-song EP,
Escape the Mind, released in 2015. During production of the EP, the band met producer Jake Carmona, who went on to contribute to
Escape the Mind and their next two albums. In April 2015, the band appeared on
The Ellen DeGeneres Show. During this period, the sisters raised funds, including a $10,000 donation each from
DeGeneres and the
Target Corporation, They also gave two presentations at the
TEDx conference at the
University of Nevada, one in 2016 and one in 2017. The band was known for practicing with the
Rock Band video game series early in their history, so the game's designers returned the favor by including two songs by The Warning in
Rock Band 4. The Warning's first full-length album,
XXI Century Blood, was released in 2017. The music video for the title track won several awards at film festivals. During this period, they were invited to perform at the Mother of All Rock Festival in Monterrey, and also opened a show for
The Killers in that city. Their second album,
Queen of the Murder Scene, was released in 2018. In 2019, The Warning performed at
Rock al Parque, the biggest rock festival in
Latin America. At the end of 2019, they announced an extensive upcoming tour throughout North America, though it was canceled due to the
COVID-19 pandemic.
2020–present: With Lava and Republic Records in 2022. In August 2020, The Warning signed a five-album deal with
Lava Records and began work on a new album with producer
David Bendeth. The song, "Choke", was released in May 2021. Later that year, The Warning appeared on the Metallica tribute album,
The Metallica Blacklist, performing another cover of "
Enter Sandman", this time with singer
Alessia Cara. This version of the song was featured as the background music for the video game ''
Marvel's Midnight Suns and the Netflix series The Imperfects''. The six-song EP
Mayday was released in October 2021, and The Warning embarked on a tour of North America in early 2022, performing more than 30 dates as headliners plus opening for
Foo Fighters,
Sammy Hagar and the Circle, and
Stone Temple Pilots. They released the single, "Money", in March 2022, and the song reached number 31 on the
Billboard Mainstream Rock Airplay chart.
Error in
Burlington, Ontario in 2022. The band's third studio album,
Error, comprising the six tracks from the
Mayday EP plus "Money" and seven new songs, was released in June 2022. In July, they embarked on a U.S. tour supporting
Halestorm and
The Pretty Reckless and appearing at festivals like
Burlington's Sound of Music Festival, Iceberg Alley,
Summerfest, and Upheaval, before resuming their headlining tour in August. In the first half of 2023, the band supported
Muse during several dates on the
Will of the People World Tour in both Mexico and Europe. It was The Warning's first visit to Europe. In September 2023, they performed at the
MTV Video Music Awards and, in the same month, they opened one show for Guns N' Roses during the
We're F'N' Back! Tour. In October, the band celebrated their 10th anniversary with a concert at the
Pepsi Center in Mexico City. In May 2023, they released the first new single, "More", from their upcoming album. In spring 2024, they released five more singles from the upcoming album: "Sick", "Hell You Call a Dream", "Qué Más Quieres", "Automatic Sun", and "Burnout". The official music video for "Qué Más Quieres" debuted on
MTV Live. The release of "Automatic Sun" was timed to coincide with the
2024 solar eclipse. In April 2024, they completed a second concert tour of Europe, this time as the headliner; all 19 stops of the tour were sold out. In June 2024, The Warning completed a Japanese tour at the invitation of
Band-Maid.
Keep Me Fed The band's fourth studio album,
Keep Me Fed, including the six singles and six new tracks, was released on 28 June 2024. Promoting their album release, The Warning appeared on
Jimmy Kimmel Live. In July, The Warning was featured as artists of the month on
MTV Push – a promotional event that includes exclusive videos of them performing songs and also interviews. in
Wacken, Schleswig-Holstein in 2024. During the summer, the band toured Europe again, including
Wacken Open Air and
Pol'and'Rock. The song "Show Them", a collaboration with Band-Maid recorded during the Japanese tour, was released as a joint single in August 2024 and included on Band-Maid's album
Epic Narratives, released the following month. In September and October, they went on an extensive North American tour to support
Keep Me Fed. In November 2024, The Warning performed at the
MTV Europe Music Awards and a few days later, at the
25th Annual Latin Grammy Awards. On 12 December 2024, The Warning released the single, "Hurt", a collaboration with
Dead Poet Society. This came about after Paulina joined the Massachusetts-based band on stage for a performance of the song at the
Aftershock Festival in California earlier in the year. At the end of the year, The Warning appeared on the French TV show,
Taratata. In spring of 2025, the band started a new leg of their
Keep Me Fed tour, including three sold-out nights at
Auditorio Nacional in Mexico City, with one being recorded for a live album and film. The band later joined
Halsey as an opening act for part of the singer's North-American
For My Last Trick tour. During the summer, they performed at several European rock festivals such as
Sweden Rock,
Rock im Park and Rock am Ring (where they joined Dead Poet Society again on stage),
Nova Rock, and
Pinkpop. The band toured further in the United States in summer 2025, and they wrapped up their 2025 schedule in August at the Pachuca Rock Fest in Mexico. The band's first concert film
Live from Auditorio Nacional, CDMX was released in theaters in August 2025. In March 2026, they released the first new single, "Kerosene", from their upcoming album. During the spring and summer, the band goes on a major UK and USA tour, supporting
Yungblud. ==Musical style and influences==