Final answer:
By the end of the 2020 Atlantic hurricane season, the activity had markedly increased with 30 named storms, surpassing the average seasonal figure. The term "exploded" metaphorically describes the significant spike in hurricane activity observed.
Step-by-step explanation:
By the end of the 2020 Atlantic hurricane season, Atlantic records had exploded in terms of the number of named storms. The National Oceanic and Atmospheric Administration (NOAA) reported an unprecedented season with 30 named storms, where an average season usually sees 12. The 2020 season also saw a record number of storms making landfall in the United States, totaling 12.
The term "exploded" here does not refer to a physical explosion but is used to describe the dramatic increase in hurricane activity during the 2020 season, which was one of the most active seasons in the recorded history of Atlantic hurricanes.