A storm crossed over Lake Lavon on Saturday night and caused a boat with four people onboard to overturn, according to the Collin County Sheriff's Office. STORY: https://www.wfaa.com/article/news/local/1-dead-2-missing-boat-overturns-north-texas-lake-lavon/287-b0fcabb7-6e46-492c-b7e3-f42bcc20f9cc