At what point do you worry!!!

I'm currently away in our van with our daughter on our own. 

At the moment the wind is gusty, I have put up our lightweight porch awning and secured it with rock pegs as the ground requires them.

now the wind tonight is due to top at 25/26mph, the awning is fluttering a bit and the van is being rocked by the gusts.

as OH is not here, what strength wind should I worry about and consider taking the awning down? I have put the storm straps on it.

i know I am probably overreacting but a more seasoned caravaners thoughts would put my mind at rest tonight!