1998 Chevrolet Astro Owner's Manual - Page 201

Hydroplaning usually happens at higher speeds. There just isn't a hard and fast rule .about hydroplaning. The best advice is to slow down when it israining. City Driving Driving Through Deep Standing Water NOTICE: If you drive too quickly through deep puddles or standing water, water can come in through your engine's air intake and badly damage your engine. Never drive through water thatslightly is lower than the underbody your vehicle. If you of can't avoid deep puddles or standing water, drive through them veryslowly. Some Other Rainy Weather Tips 0 Besides slowing down, allow some extra following distance. And be especially careful when you pass another vehicle. Allow yourself more clear room ahead, and be prepared to have your view restricted by road spray. Have good tires with proper tread depth. (See "Tires" in the Index.) One of the biggest problems with city streets is the amount of traffic on them. You'll want to watch out for what the other drivers are doing and pay attention to traffic signals. 4-17