The weather conditions have not made it possible to allow any running in the first free practice session for the Eifel Grand Prix at the Nurburgring. FP2 is still expected to go ahead at 15:00 local time.
Race Director Michael Masi explained during the session it was too dangerous, as urgent medical assistance would be impossible in case something happened.
"It is a bit challenging, obviously, with the fog that’s come in, the medical helicopter is not able to take off and fly to the hospital," he said. "The distance by road is far too far should something occur.
"Obviously the region that we’re in is probably not dissimilar to Austria, earlier in the year where we had a similar situation. It’s just the nature of the area and the location, and the fog’s come in, it’s sort of been going up slightly then coming down more dramatically.
"We’ll just judge at the time and from an FIA perspective the safety of all the participants, particularly of the drivers coming out is paramount and that’s not something we will not compromise."
The weather also meant that Ferrari younsters Mick Schumacher and Michael Calum could not make their debut FP1 runs.