The world’s poor are suffering more because of climate change, according to a new Oxfam report titled “Suffering the Science,” which tells the stories of people around the world facing changing climate conditions.

July is a particularly harsh month in large swathes of Africa. It’s the peak hunger season and this year people are expected to be more vulnerable than usual following record high food prices in 2008, Oxfam estimates.

“I travel a lot and people are always saying to me, ‘the seasons have changed,’”Oxfam chief executive Barbara Stocking told CNN. “I think there’s a real sense of uncertainty. People have lost confidence. They have a very close relationship with the Earth, nature and climate and suddenly they’re finding that it doesn’t work anymore.”

“For me the big worry is that many of them don’t know why it’s happening so they can’t actually help themselves prepare for change,” Stocking added.