Hurricane Irma is currently making its way towards Haiti, and is expected to affect the country within the next 24 hours.
Irma is following a path further north than initially forecast, meaning that its force in Haiti may be less powerful than first predicted. A hurricane watch remains in place in north Haiti, with a tropical storm warning set for the southern border with the Dominican Republic across to Port au Prince.
John explained that, although the force of the winds may not be as damaging as first thought, Haiti remains at high risk of storm surges, mudslides and flooding, as the storm could bring huge amounts of rainfall with it.
You can listen back to the interview below, forwarding to roughly halfway through the show to hear what John had to say: