Poás Volcano Erupts, Ash Plume Reaches 6,500 Feet, Affects Communities

Costa Rica's Poás Volcano has experienced a series of significant eruptions and near-continuous ash emissions in recent weeks, with the most intense explosions sending ash plumes up to 4.5 kilometers above the crater and dispersing toxic gases and debris over surrounding communities, including Zarcero, Grecia, Alajuela, Heredia, and San José. Authorities have reported sulfur dioxide emissions often exceeding 600 tons per day and noted the activity has shifted from Boca C to Boca A vent. The eruptions have led to the indefinite closure of Poás Volcano National Park and the maintenance of elevated alerts for the region, as health officials urge residents to wear masks due to poor air quality and the risk of toxic exposure. The National Emergency Commission and other agencies continue to monitor the situation closely, emphasizing official updates for public safety. Recent activity shows some indications of stabilization, though authorities remain vigilant given the volcano’s unpredictable behavior. Residents have shared images of widespread ashfall, and U.S. and local officials have issued safety advisories and travel warnings for the affected areas.