Higher Probability of Occurrence of Hotter and Shorter Heat Waves Followed by Heavy Rainfall

The consecutive heat wave and heavy rainfall (CHWHR) events, defined as the occurrence of waves followed by rainfall, can cause more damages than individual extremes. Nevertheless, this type compound event has not been diagnosed systematically. Here we examine CHWHR events underlying characteristics. We find 22% land areas experienced statistically significant within 7 days in China during 1981–2005, with an average 26% being (vs. 10% expected chance). More importantly, shorter hotter are likely to be other waves. This phenomenon is associated atmospheric convection moisture convergence. In addition, climate projection shows will occur frequently abruptly throughout 21st century, which contribute increased risk back-to-back flash floods.