This article provides insight into the under-researched area of civil protection cooperation and disaster response capacity in EU law. It discusses how the mechanisms set up by the EU have assisted Member States in supporting one another when faced with natural or man-made disasters, including those perpetrated by terrorists. In particular, the article provides a critique of the Article 222 of the Treaty on the Functioning of the European Union (TFEU) clause, which has introduced the principle of solidarity within the EU's security strategy. The author explores the broadened notion of ‘threat’ in Europe and assesses the significance of the Solidarity Clause vis-à-vis the level of commitment required by Member States for its coherent implementation. The article then contrasts Article 222 TFEU with the mutual defence clause of Article 42 (7) Treaty on European Union (TEU), and finally points into certain ‘grey areas’ that may have a diminution effect upon the political message concerning the EU as a community based on solidarity.