Help me to translate this sentence please,especially some words like "category 4"!In Santo Domingo,the capital of the Dominican Republic,a boy was pulled into the ocean and drowned while watching waves kicked up by the Category 4 storm strike an oceanfront boulevard,the emergency operations center reported.

Help me to translate this sentence please,especially some words like "category 4"!
In Santo Domingo,the capital of the Dominican Republic,a boy was pulled into the ocean and drowned while watching waves kicked up by the Category 4 storm strike an oceanfront boulevard,the emergency operations center reported.