21 May 2022, the sixth largest "insured loss event" in Canadian history. Destruction of utility poles deprived some rural communities of telephone and electricity services for a week or longer. Aviation Derechos can be hazardous to aviation due to embedded microbursts, downbursts, and downburst clusters. In addition, the powerful updrafts and high cloud tops can cause for dangerous conditions. Their sheer size also makes them very difficult to navigate around. See also Convective storm detection Extreme weather Mesocyclone Mesoscale convective vortex (MCV) Mesovortex Microburst List of derecho events References Further reading Ashley, Walker S., et al. (2004). "Derecho Families". Proceedings of the 22nd Conference on Severe Local Storms, American Meteorological Society, Hyannis, Massachusetts. External links Facts about derechos (Storm Prediction Center's "About Derechos" web page; Stephen Corfidi with Robert Johns and Jeffry Evans) What is a derecho? (University of Nebraska at Lincoln) What is a derecho? (Meteorologist Jeff Haby's education page) Derecho Hazards in the United States (Walker Ashley) Origin of the term "Derecho" as a Severe Weather Event (Meteorologist Robert Johns) A Mediterranean derecho: Catalonia(Spain), 17 August 2003 (ECSS 2003, León, Spain, 9–12 November 2004) American Museum of Natural History Science Bulletins: Derecho December 2003 Storm Severe weather and convection Weather hazards Wind Spanish words and phrases