We are seeing a lot of medical calls for service related to carbon monoxide exposure problems. Never run your generator in an enclosed space. Always keep your running portable generator 20 feet from your home.
Please read this article from Consumer Reports.
"Generator misuse leads to deaths from carbon monoxide (CO) poisoning, injuries from close calls, and burns—all of which happen too often during power outages and storms. The biggest problem, according to reports from the Consumer Product Safety Commission (CPSC), is CO poisoning. Portable generators can produce deadly levels of carbon monoxide, a colorless, odorless, and tasteless gas."
https://www.consumerreports.org/generators/generator-safety-tips-to-get-you-through-a-storm/