As they wait to make their case for asylum, thousands of Central American migrants are living at the Benito Juarez Sports Complex, which has become a makeshift shelter in Tijuana, Mexico.

Human-rights groups have described conditions inside this shelter as squalid and unsanitary, and Tijuana's mayor says his city needs more help to handle it.

It could be months before these migrants have their cases heard, and the waiting list grows longer every day.

An aerial view of the shelter, as seen on Tuesday, November 27.
An aerial view of the shelter, as seen on Tuesday, November 27.
Guillermo Arias/AFP/Getty Images
Clotheslines hang over tents and sleeping bags inside the shelter on Wednesday, November 28.
Clotheslines hang over tents and sleeping bags inside the shelter on Wednesday, November 28.
Atilgan Ozdil/Anadolu Agency/Getty Images
Migrants wait in line to receive donated items from a church group outside the shelter.
Migrants wait in line to receive donated items from a church group outside the shelter.
Mario Tama/Getty Images
Mexican Federal Police keep watch outside the shelter.
Mexican Federal Police keep watch outside the shelter.
Mario Tama/Getty Images
A woman tries to sweep away floodwaters between bouts of heavy rain on Thursday, November 29.
A woman tries to sweep away floodwaters between bouts of heavy rain on Thursday, November 29.
Rebecca Blackwell/AP
Jessica Perez, an 18-year-old from El Salvador, nurses her 6-month-old son, Giovanni.
Jessica Perez, an 18-year-old from El Salvador, nurses her 6-month-old son, Giovanni.
Lucy Nicholson/Reuters
Miguel Angel Luna gets his hair rinsed as he undergoes a treatment for lice on Monday, November 26. A group of local volunteer nurses had set up outside the shelter to help.
Miguel Angel Luna gets his hair rinsed as he undergoes a treatment for lice on Monday, November 26. A group of local volunteer nurses had set up outside the shelter to help.
Gregory Bull/AP
Well-wishers hand out donated clothes from the trunk of a car outside the shelter.
Well-wishers hand out donated clothes from the trunk of a car outside the shelter.
Rebecca Blackwell/AP
Many staying in the shelter are sleeping outdoors -- some in tents, some lying on the dirt in sleeping bags or blankets.
Many staying in the shelter are sleeping outdoors -- some in tents, some lying on the dirt in sleeping bags or blankets.
Guillermo Arias/AFP/Getty Images
A man undergoes a medical checkup at the shelter.
A man undergoes a medical checkup at the shelter.
Bruno Gallardo/Anadolu Agency/Getty Images
Luis Rene Reyes Garcia, a 28-year-old from Guatemala, reads a donated Bible as he rests on the street outside of the shelter.
Luis Rene Reyes Garcia, a 28-year-old from Guatemala, reads a donated Bible as he rests on the street outside of the shelter.
Rebecca Blackwell/AP
A migrant sells cigarettes outside the shelter.
A migrant sells cigarettes outside the shelter.
Pedro Pardo/AFP/Getty Images
A girl rides a swing at the shelter.
A girl rides a swing at the shelter.
Guillermo Arias/AFP/Getty Images
People line up for food at the shelter. Members of the Mexican navy have set up mobile kitchens where they prepare and distribute meals. But the wait can take hours.
People line up for food at the shelter. Members of the Mexican navy have set up mobile kitchens where they prepare and distribute meals. But the wait can take hours.
Omar Martinez/Picture Alliance/Getty Images
A man steps across mud after taking a shower at the shelter.
A man steps across mud after taking a shower at the shelter.
Lucy Nicholson/Reuters
A man eats inside a tent.
A man eats inside a tent.
Pedro Pardo/AFP/Getty Images