Weinberg noted that Katrina had been a Category 3 hurricane before moving up to Category 5, and there are thus still concerns about whether New Orleans' partially-rebuilt levee system can contain asuddenstorm surge and prevent the city from flooding.
We recognize that no matter how responsibly we live our lives, any one of us at any time may face a job loss or asudden illness or a home swept away in a terrible storm.
It makes sense to me that major behavioral factors would influence a solo sailor during asudden unexpected squall or a hiker caught in a severe electrical storm.