NEW : Officials say high temperatures will make travel dangerous for drivers . A weather report shows images of overturned vehicles and collapsed carports . The storms could be among the world 's very worst since record - keeping began in the 1940s . A series of severe winter storms and record-breaking cold also hit the region in the 1950s , according to CNN affiliate KOMO . Officials warn of treacherous road conditions .
NEW : Officials say high temperatures will make travel dangerous for drivers . A weather report shows images of overturned vehicles and collapsed carports . The storms could be among the world 's very worst since record - keeping began in the 1940s . Officials warn of treacherous road conditions .