The Tijuana Estuary in Imperial Beach, California, has seen a surge in hydrogen sulfide from the polluted Tijuana River, which has been causing headaches, upset stomachs, and breathing problems for students and their families. Virginia Castellanos, the school nurse for Bayside STEAM Academy near the estuary, expressed concern about students suffering headaches, stomachs and breathing issues due to the foul odor. She also noted that her own seven-year-old daughter, who suffers from asthma, was home sick with asthma when pollution spikes. The air pollution monitoring data showed high temperatures and cross-border sewage flows from a broken pump in a Tijuana sewage facility. The health impacts of raw sewage entering the river in Mexico can be felt across the border. The foul odor often keeps children indoors, away from parks or beaches, and at school it forces them to stay indoors and off the playground. Parents are concerned about the potential for future health problems as children exposed to the polluted air.