Complex sentence: Mr. Rankin is internationally known for his disaster housing work; following the devastation of Hurricane Katrina, Rankin housed over 25,000 people through the Houston Astrodome in 18 days by creating America's first long-term disaster housing assistance program.
Split into simpler sentences: Mr. Rankin is internationally known for his disaster housing work. After Hurricane Katrina, Rankin housed over 25,000 people through the Houston Astrodome in 18 days by creating America's first long-term disaster housing assistance program.