Antonio Basco's wife was killed in the El Paso shooting on August 3. When she died, he feared he would be all alone to say goodbye to his wife, according to ABC News.
Her vigil will be held Friday, August 16, and now thousands are expected to attend. Her funeral is being held on Saturday and a similar crowd is expected there.
Basco and his wife, Margie Reckard, were married for 22 years.
Basco decided to welcome strangers to his wife's services because he didn't have any family nearby.
The response was so great that funeral staff have relocated the funeral to a larger venue, one that seats 500 people.
"The outpouring and amazing response from all over, not just our city, but the country is gonna be more than the capacity of the venue that we have," Harrison Johnson, director of the Perches Funeral Homes, said.
People from as far away as California have expressed interest in attending the funeral.
Johnson said that Basco has been "overwhelmed" by the response.
The vigil for Margie Reckard begins at 6 p.m. local time and she will be buried on Saturday morning.
Read ABC News' full story here.
