Climatic extremes, in particular storms and heat waves, are now becoming more frequent, a trend that has been linked to directional climate change and is projected to continue. The overarching aim of the MANTEL European Joint Doctoral (EJD) Training Network is to train a cohort of Early Stage Researchers (ESRs) to investigate the effects of the most extreme events, and more subtle lower magnitude episodic events, on lake and reservoir water quality.