Danger not over: Gas leaks, mould loom for Harvey evacuees

HOUSTON — Bound for their Harvey-soaked home east of Houston, Lakeithia Bankhead and her four children left the mass shelter at the city’s convention centre Friday after five nights sleeping on cots among thousands of other evacuees. They filled a relative’s sport utility vehicle with trash bags full of donated clothes, food and a baby bed.

But Bankhead felt ill-equipped to confront health hazards in the form of mould, spoiled food, gas leaks and downed power lines. The 38-year-old knows she’ll have to pull out the wet carpet of her rented home, but she doesn’t know what to do with other potential problems like mould, which can cause respiratory problems if inhaled.

The danger isn’t over yet for Harvey evacuees who are returning to flood-ravaged homes and dragging sodden debris to the curbside. Sharing advice on recommended mould-cleaning strategies and other safety tips is now one of the biggest challenges for public health officials in Harvey’s aftermath.

While some who escaped the flooding lost internet access when they abandoned or lost mobile devices, many others held onto their phones. Public health officials hope to reach evacuees through Twitter, Facebook and Instagram with safety messages, and hope those who see the tips posted online will spread the word to others.

Avoiding health threats during flood cleanup requires forethought. Here are some health precautions:


Mildew and mould can start growing in a home a day or two after flooding. It will keep growing unless it’s removed. Inhaling airborne mould spores can cause coughing, wheezing and asthma attacks. People with chronic conditions can develop dangerous infections in their lungs.

Dry out a damaged home as soon as possible. When it’s safe to use electricity, turn on a fan in a window to vent air to the outdoors.

Hard surfaces can be cleaned with soap and water, and then disinfected with a bleach solution — roughly one cup of bleach to one gallon of water.

“We’re posting tips like don’t mix bleach and ammonia” to clean up mould because the two cleaning supplies together produce toxic fumes, said U.S. Health and Human Services Department spokeswoman Joni Geels.

But dry wall, insulation, carpeting, bedding and anything porous including books must be destroyed.

“That little spot of mould can grow in the home especially in the heat of the South,” said Dr. Parham Jaberi of the Louisiana Department of Health.

If mould covers more than 100 square feet, a trained mould remover is recommended, he said.


Before entering a flood-damaged home, check for loose power lines or gas leaks. At least one person died in Harvey’s aftermath when he stepped on a live electrical wire in ankle-deep water.

Carbon monoxide fumes are a threat as people return to homes without electricity and hook up generators, said Renee Funk of the Centers for Disease Control and Prevention.

“Any sort of roof over a generator is actually a problem,” Funk said. “When people go in and out to refill the generator they can be overcome.”

If a structure, like a garage or shed, is attached to the house, the house can fill with fumes.

Charcoal grills and camp stoves used indoors also can produce carbon monoxide.


The Texas Department of State Health Services is urging people with puncture wounds or cuts exposed to floodwaters to get a tetanus shot if they haven’t had one within the last 10 years.

Sagging ceilings, slippery floors and other structural problems can cause injuries. Exhaustion can contribute to accidents. Children should not take part in disaster cleanup work.


Food that may have come into contact with floodwaters is unsafe to eat. Cardboard containers for juice, milk or baby formula should be discarded because they can’t be sanitized. Throw out any food in damaged cans.

Harvey knocked out municipal water service in some areas. Boil water or use bottled water for drinking if water comes from a well or if officials have issued warnings.

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