The Arkema Inc. plant in Crosby, Texas, lost power and its backup generators amid Harvey's dayslong deluge, leaving it without refrigeration for chemicals that become volatile as the temperature rises.
A heavy band of rainfall Monday night proved too much for some Lake Charles, Louisiana neighborhoods, pushing water into houses that local residents said they'd never seen flood.
In a series of tweets Sunday President Trump said his administration was handling its responsibilities well and, in a tangential aside, hawked a book on race and crime in America written by a supporter.
Authorities did not know the full scope of damage in the area between Corpus Christi and Houston because weather conditions prevented emergency crews from getting into the hardest-hit places.