February is the windy season — Harmattan — in the Sahel region of Africa.
"That brings huge amounts of dust from the Sahelian Desert. There are some trees, but people have no protection from the wind," Birch told CT. Refugees improvise shelter with bed sheets and clothes they brought with them when they fled Chad's capital. "But that's very small protection in the circumstances," she said. The temperature at night falls to around 15 degrees Celsius (59 degrees Fahrenheit). "For the people here that's actually quite cold."
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