Rain drenched Long Island on Wednesday causing road closures, flooding, power outages, flight delays, a commuting nightmare and pure frustration.

The New York State Department of Transportation reported that all lanes on the Northern State Parkway westbound were closed at Route 106-Route 107 and all lanes were closed on the Meadowbrook State Parkway northbound at Route 24.

Many additional roads in Nassau were closed due to flooding - the NYSDOT issued flood warnings to motorists using all Long Island roads. Cars were left underwater as the flash floods hit the area.

Employees at Trio Hardware in Plainview were busy cleaning up and selling supplies to local residents. "We were well-stocked and never ran out of supplies," said Bruce Carlow who owns the store with his wife Francesca.

"We had plenty of sump pumps, mops, buckets, squeegees, shop vacs, damp rid, fans, extension cords, flashlights and batteries," said Carlow. "We even had calls for heaters, which we did have in stock. It only became busy once the rain subsided. During the morning and afternoon we heard real horror stories about flooded basements, cars, streets, lawns etc. In my 44 years in business I have never before seen so much water in such a short period of time."

Flooding on the Long Island Railroad caused the suspension of service on the Port Jefferson, Ronkonkoma, Oyster Bay and Montauk branches, according to the Long Island Rail Road.

At noon on Wednesday, LIPA reported 4,356 customers in Nassau County were without electric and as of 5 p.m. on Wednesday over 1,000 customers in the Town of Oyster Bay were still without power.

The Long Island Power Authority (LIPA) held a press conference in Old Bethpage to announce that it is in full restoration mode following the severe storm.

LIPA CEO & President, Richard M. Kessel, said that close to 500 LIPA and KeySpan personnel will work 16 hour shifts to restore power to electric customers.

"The line of storms that struck Long Island... created massive flooding and numerous power outages," said CEO Kessel. "LIPA crews will work around the clock to get the power back for all of our customers as quickly as possible. I am asking our customers to be patient as the working conditions are extremely dangerous and we want our crews to operate safely as well as efficiently."

Kessel also said that the massive amount of rain in a short period of time created flooding problems in LIPA's Central Control Room. While the Control Room continues to operate normally, LIPA has manned its Alternative Control Center, along with key substations, in the event LIPA's system cannot be run through the Hicksville Operations Center.