NASA Earth Observatory image by Joshua Stevens, using GEOS-5 data from the Global Modeling and Assimilation Office at NASA GSFC. Heat waves are multiday periods of extremely hot temperatures and among the most deadly natural disasters. Studies show that heat waves will become longer, more numerous, and more intense with global warming. Related publications: Philip, S. Y., Kew, S. F., van Oldenborgh, G. J., Anslow, F. S., Seneviratne, S. I., Vautard, R., Coumou, D., Ebi, K. L., Arrighi, J., Singh, R., van Aalst, M., Pereira Marghidan, C., Wehner, M., Yang, W., Li, S., Schumacher, D. L., Hauser, M., Bonnet, R., Luu, L. N., Lehner, F., Gillett, N., Tradowsky, J., Vecchi, G. A., Rodell, C., Stull, R. B., Howard, R., and Otto, F. E. L. (2022): Rapid attribution analysis of the extraordinary heatwave on the Pacific Coast of the US and Canada June 2021, Earth Syst. Dynam. doi:10.5194/esd-2021-90 Baldwin, J. W., Dessy, J. B., Vecchi, G. A., & Oppenheimer, M. ( 2019). Temporally compound heat wave events and global warming: An emerging hazard. Earth's Future, 7, 411– 427. doi: 10.1029/2018EF000989