The Grammy Award-winning band shared that they had to pull out of two shows due to a 'critical illness' in the family.

CNN has reached out to a representative for Matthews for comment. The FireAid benefit concert, a music event set up to aid the relief efforts following the deadly and devastating Los Angeles wildfires, is set to take place on Thursday at the Kia Forum and the new Intuit Dome, both located in the LA city of Inglewood.

Singer was scheduled to perform with John Mayer for the first time at the FireAid concert on Jan. 30, followed by a Grateful Dead tribute at the MusiCares event on Jan. 31