Puerto Rico is still dealing with the aftermath of Hurricane Maria, so a 26-person medical team from Massachusetts General Hospital is heading down to assist with medical care.
Some of them caught a flight early Saturday morning.
Others were set to join them later Saturday.
NBC Boston caught up with nurses Kristen Wilson and Catherine Liberles at Boston Logan Airport Saturday morning.
Wilson also volunteered in Houston earlier this year.
"I have a passion for it," Wilson said when discussing how it is to deal with two natural disasters in one year. "I'm on a federal team, and it's just the nature of how it is. You just get up and go when you're called."
Liberles, who has done a lot of work in Haiti, said she didn't know what to expect in Puerto Rico.
"Whatever conditions we arrive in, I have worked in areas where we have no running water and no electricity, and that was our beginnings so whatever we need to do," she said. "I don't know what it will be like. I imagine there will be generators but we'll roll up our sleeves and do what we can with what resources we have."
The MGH team includes 15 nurses, four nurse practitioners, five doctors, one physician assistant, and one security staff.
They are expected to be in Puerto Rico for a little over two weeks.