Then the tarpaulins are removed and the house is allowed to air out before the inhabitants are allowed back in. Dangers of Fumigation Fumigation can pose hazards for building occupants and neighbors alike. Both may pose real threats to occupants of fumigated structures, and their neighbors, even when used according to the law. Methyl bromide is a potent neurotoxin. Exposure to low levels can cause nausea, vomiting, loss of appetite, dizziness, drowsiness, and dimming of vision.
Higher concentrations can cause vomiting, convulsions, coma, and death.
Chronic health effects include neuropsychiatric problems, reproductive harm, and birth defects. Methyl bromide is listed as a reproductive toxin under California s Proposition 65, and neighbors and building occupants must be notified before fumigation. 19 people have died from methyl bromide in residential fumigations in California since 1982. Methyl bromide is also an extremely potent ozone-destroying chemical and is scheduled to be banned in 2004 by the Montreal Protocol, although a recent law backed by the agrochemical industry will allow it to be used indefinitely in the U.S. for critical uses. Methyl bromide has been found to persist at high levels in wall voids and enclosed spaces, and seep out even after structures have been ventilated.