The Federal Emergency Management Agency and officials in Texas don't want to use massive structures to house people, but sometimes that is the best option.

Louisiana, another critical area for oil plants, is watching Harvey's path.

Every expert she's talked to says regulations for building in the city's flood plains are insufficient, says Texas-based reporter Neena Satija.

It's a long process that starts 48 hours before the storm makes landfall. Starting back up can take even longer.