A DDoS attack is currently crippling Blizzard’s Battle.net servers, according to Blizzard’s official Twitter account. Overwatch, Hearthstone, World of Warcraft and other Blizzard titles are unavailable for play. The hack comes at the end of Overwatch’s Summer Games event, the beginning of which was also marred
by a DDoS attack on August 2nd.
Source: Kotaku – Another DDoS Attack Takes Out Blizzard’s Servers