can you list a few damages caused due to this event?
Minor, localized flooding and some short-term road closures in Hawaiian Islands. In Johnston Atoll monetary losses were estimated at close to $15 million.
Hurricane John (1994)
heavy rains on the Big Island of Hawaii caused minor, localized flooding and some short-term road closures. No deaths, injuries or significant damages were reported in Hawaii.

Although John passed within of Johnston Atoll, it had weakened greatly to a Category 1 system by closest approach. Prior to the storm's arrival, waves between were reported on the island. Additionally, in the Northern Hemisphere, the strongest winds and heaviest rain lie to the north of a tropical cyclone, so the atoll, which lay to the south of the storm's path, was spared the brunt of the storm. Nonetheless, the 1,100-man personnel for the United States military base on Johnston Atoll had been evacuated to Honolulu as a precaution while John approached. Damage to structures was considerable, but the size of the island and relative functionality of the base led to low damage; monetary losses were estimated at close to $15 million (1994 US$).
which countries were affected by hurricane john in the year 1994? The Hawaiian Islands and the United States military base on Johnston Atoll, and Alaska. from which water body did this cyclone originate? It was formed from a tropical wave of a water body off the coast of Africa. what was the highest wind speed recorded due to this event? 175 mph (280 km/h). which category does it fall under as per this wind speed intensity? Category 5. can you name a few agencies or departments that alerted the country of this event? The United States National Hurricane Center.
wiki:12303064
Hurricane John (1994) [SEP] Impact
John affected both the Hawaiian Islands and Johnston Atoll, but only lightly. While John passed over 345 miles (550 km) to the south of Hawaii, the islands did experience strengthened trade winds and rough surf along the southeast- and south-facing shores, and, while moving westward, on west-facing shores as well. The waves, ranging from in height, flooded beach parks in Kailua-Kona. Additionally, heavy rains on the Big Island of Hawaii caused minor, localized flooding and some short-term road closures. No deaths, injuries or significant damages were reported in Hawaii. Although John passed within of Johnston Atoll, it had weakened greatly to a Category 1 system by closest approach.