As Hurricane Harvey pelted Houston with heavy rains this week, a local television news station broadcast footage of flood evacuees sitting outside the George R. Brown Convention Centre. The people weren't waiting for space inside what would become a massive emergency shelter. They were choosing to remain outdoors because their
No pet left behind: Lessons learned from Katrina
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Marine Corps League member Jeff Webb (left) and rescue diver Stephan Bradshaw were able to save a dog that had been chained to a flooded porch in Lumberton, Texas. Photo / AP

A dozen years later, Katrina is viewed as a watershed moment in planning for pets during natural disasters. It changed federal and state policies - and, animal advocates and experts say, made clear that Americans have widely embraced the idea of dogs and cats as family members.
"You saw pictures of dogs standing on roofs and cats swimming in these toxic waters, and there was a huge public outcry," said journalist David Grimm, who wrote about the impact in his book, Citizen Canine.
At the time, emergency management plans took only people into account. The result was an ad hoc approach to animals, with some responders flat-out turning away dogs and others agreeing to evacuate them. Animal protection groups, which quickly became overwhelmed with displaced critters separated from their owners, often found themselves at odds with local and state officials, recalled Wayne Pacelle, chief executive of the Humane Society of the United States.
The sense that systems had failed both pets and people quickly reached Capitol Hill. In 2006, Congress overwhelmingly passed legislation requiring local and state authorities who want federal emergency grants to include pets in disaster plans. It also authorised the use of federal funds for pet-friendly emergency shelters.
Snowball was the impetus.
"The dog was taken away from this little boy, and to watch his face was a singularly revealing and tragic experience," Representative Tom Lantos said at the time. The California Democrat, who died in 2008, sponsored the House version of the Pet Evacuation and Transportation Standards (Pets) Act - legislation "born at that moment" with Snowball, Lantos said.

More than 30 US states now have laws that address disaster planning for pets and service animals. Texas requires its emergency management officials to help localities devise plans "for the humane evacuation, transport and temporary sheltering of service animals and household pets in a disaster". Not all evacuation centres there were accepting pets this week, but many are accommodating them in separate areas or co-ordinating with off-site shelters to house them. In San Antonio, for instance, a state-run reception centre for Harvey evacuees routes pets to a city-run animal shelter, after assigning them and owners individual ID numbers that will help reunite them later.
The images and stories out of southeast Texas - of rescue boats loaded with dogs and people - are far different from those that emerged during Katrina. Lisa Eicher's experience offers just one example. When the Conroe resident woke on Tuesday, floodwaters had nearly submerged the 4.5m of steps up to the first floor of her family's home. Before she, her husband and four children could pack more than a garbage bag of clothes, firefighters had rolled up outside in a muddy dump truck and were telling them to leave.
"We have two kids with Down syndrome, a pig and a three-legged dog," Eicher recalled telling them.
"Sounds good," one firefighter responded. "Let's do this." Soon Eicher's husband and a firefighter were helping Pip, a terrier mix, swim across the murky water. Next up was Penny, a mottled potbellied pig that floated on a yellow life jacket.
"A dog is one thing, but a pig is different," Eicher said in a phone interview from Austin, where the family - pets included - are staying with friends. "I was worried that we weren't going to be able to bring her ... The fact that they were so good with our pets was really sweet and meant a lot."
"Pets essentially became members of society: You rescue the people, and you also try to rescue the cats and dogs," said Grimm, the journalist. "Nobody is passing laws saying you should rescue the toasters. It's really a huge, fundamental shift that happened."