Simplify the following text for a Grade 10 native English-speaking person.
Original: It reached its peak intensity on August 1 , with winds of 135 mph ( 215 km\/h ) and a central pressure of 946 millibars , making it the strongest hurricane of the season at a Category 4 strength .
Simplified: It reached its peak intensity on August 1 , with winds of 135 mph ( 215 km\/h ) and a central pressure of 946 millibars , making it the strongest hurricane of the season .