The rainfall pattern has changed in Perth and southwest Western Australia since the mid-1970s. A significant reduction in winter rainfall has been observed with a greater number of extreme rainfall events in the summer, such as the slow-moving storms on 8 February 1992 that brought of rain, heavy rainfall associated with a tropical low on 10 February 2017, which brought of rain, and the remnants of ex-Tropical Cyclone Joyce on 15 January 2018 with . Perth was also hit by a severe thunderstorm on 22 March 2010, which brought of rain and large hail and caused significant damage in the metropolitan area.