On April 28, a nurse at the Aurora ICE Processing Center near Denver called 911. It was just one incident in a spike of emergencies playing out inside Immigration and Customs Enforcement detention centers nationwide. A WIRED investigation into 911 calls from 10 of the nation's largest immigration detention centers found that serious medical incidents are rising at many of the sites. The records WIRED reviewed capture only the medical emergencies that resulted in a 911 call—typically made by facility staff. For example, on March 16, a woman identifying herself as a detainee at the Stewart Detention Center in Lumpkin, Georgia, called 911.