Gertude,
its standard procedure to close the airport at a licensed airfield until such time that:
1. The airport fire service and other departments required have dealt with the incident and are fully available to other users, i.e foam tenders are fully replenished and other service vehicles are back to full strength.
2. It can be ascertained, as you so glibly put, that any other surfaces are fully fit for purpose.
3. The aircraft involved in any incident does not pose a threat as an obstruction to anyone else.
I always brief my passengers when I take them for joy rides that we might not get back into Cambridge if someone prangs an aircraft and closes the airport, but I didn't really ever expect it to happen, with a choice of several runways available.)
Not exactly the most inspiring statement I've ever seen.
I am afraid that says more about you than I ever could, what did you excpect to happen? The tooth fairy to make all the nasty things to go away?
If you don't make contingencies for the unexpected then you shouldn't be flying.