No. While Mitch was one of the deadliest hurricanes other hurricanes have been much bigger.
No. Although Irene is a very large hurricane it is by no means the biggest.
No. The most powerful hurricane in terms of wind speed was Allen (1980) with winds of 190+ mph. The most powerful hurricane in terms of low pressure was Wilma (2005) with a central pressure of 882 mb...
Hurricane Carla in 1961. It hit Texas's coast. It went 175mph! According to ranker, Bhola cyclone was the biggest.
No