Tens of thousands of Venezuelans are pouring over Colombia’s border every day in search of food and fuel.

Olga, a 32-year old nurse, stands with her possessions piled up in boxes and suitcases by her feet, her two children playing by her side. She and her husband, Luis, are halfway through their 800-mile journey from Caracas to the Colombian coast. Everything they could not carry they left behind.

“It’s been five months since we’ve been able to buy rice,” she said. “All we could get was arepas [maize dough]. We didn’t have soap to wash the girls. They say there’s food, but it’s a lie, there’s none.”

The border between the two neighbours reopened a week ago and the numbers arriving have been huge; 2,200…