NASA Earth’s Applied Sciences Program has prepared a scientific post on the Making Space for Earth blog to commemorate One Health Day 2018. This campaign promotes three public health projects that use Earth observation data to address health challenges. These three projects are related to extreme heat (“Preventing Heat-Related Illnesses in New York”), cholera outbreaks (“Cholera Forecasts Enhance National Preparedness and Support Measures”), and harmful algal blooms (“Space Views Aid Florida ‘Red Tide’ Health Alerts”).