Just wondering Carole. Cars aren't fully watertight and the spray/drier can carry droplets.
If it is an automatic one you'll be using then I'd have thought the amount of detergent in use would reduce the risk to virtually zero. It might depend though on the exact type/model of wash and how well it is maintained.
I wouldn't be tempted to use a manual car wash under any circumstances, even if they had been allowed to start working again.
If the car is really dirty (from non use) then personally I'd put in the effort to wash it at home. The automatic machines are designed to remove 'normal' levels of dirt in 'normal' circumstances. With a car that hasn't been used much and left in hot weather, some of the dirt (grit) will be adhering to the paintwork more firmly than is normal.
The best way of dealing with that is to soak the car all over a couple of times (leaving a bit of time each time to allow the detergent to soak in and work) before applying any 'mechanical' dirt removal (aka rubbing). After that, wash using extra detergent in the bucket and go easy with the rubbing. Otherwise you'll be using the dirt like sandpaper.
The automatic car washes won't take so much care - they are designed to do a job as quickly as possible.