The answer to 'how did fumigation get in my house' is that fumigation typically occurs when a professional pest control company treats a home for a serious pest infestation, such as termites or bed bugs. Fumigation involves releasing a toxic gas throughout the home that kills all living pests. If done improperly, this gas can sometimes seep into adjacent homes or buildings, causing unintended exposure.
This is a serious issue that requires immediate attention. If you suspect your home has been impacted by fumigation, it's important to evacuate the premises immediately and contact the pest control company that performed the work. They will be able to assess the situation and take steps to remediate any lingering gas or contamination.