Deaths From Lightning Strikes in US at Highest Since 2010

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toll – n. the number of people who are killed or injured in an accident, disaster, war, etc.

exceeded – v. to be greater or more than (something) : to go beyond the limit of (something) ​

variance – n. an amount of difference or change ​

significantly – adv. in a way that is large or important enough to be noticed or have an effect