The order came after a 20-year-old woman succumbed to her injuries on Thursday.
Civil defence authorities in Rio Grande do Sul, the state where Santa Maria is located, said the victim suffered a heart attack while struggling with injuries that included burns on more than half her body.
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Hide AdAn additional 126 people remain hospitalised after the fire, which was caused by an outdoor flare set off by a musician performing at the Kiss nightclub, investigators said.
Yesterday, a judge extended the detention of two owners of the club and two band members for 30 more days as police look into safety violations that led to the disaster early on Sunday.