The talk emphasizes the importance of OpenStreetMap as a free, open, editable map of the world, and its potential for humanitarian and emergency response. The speaker shares experiences in mapping emergency features in San Francisco and in Florence, Italy, highlighting the need for translation and diplomacy in tagging emergency features. The talk concludes with a discussion on emergency preparedness and the potential for advocacy and diplomacy in mapping air-conditioned spaces as cooling centers during heat waves. The speaker suggests contacting OpenStreetMap mailing lists, IRC, and wikis to get involved in mapping emergency features.