2010 Toyota Prius Owners Manual - Page 184

2-1. Driving procedures CAUTION ● Do not touch the exhaust pipe while the hybrid system is operating or immediately after turning the hybrid system off. Doing so may cause burns. ● Do not leave the hybrid system operating in an area with snow build-up, or where it is snowing. If snowbanks build up around the vehicle while the hybrid system is operating, exhaust gases may collect and enter the vehicle. This may lead to death or a serious health hazard.