Putting out a Fire from the opposing faction may flag you for PvP! You will also be rewarded with 10 Burning Blossoms for each opposing faction's fire and 5 for your own faction's. Put out the following fires during the Midsummer festival:

Horde

1. Blade's Edge Mountains: Located East of Sylvanaar along the road
2. Hellfire Peninsula: Located East of Honor Hold
3. Nagrand: Located near the Western bridge that leads to Telaar
4. Netherstorm: Located just North of Area 52
5. Shadowmoon Valley: Just North of Wildhammer Stronghold
6. Terokkar Forest: Located just Southwest of Allerian Stronghold
7. Zangarmarsh: Located near the Telredor elevator

Alliance

1. Blade's Edge Mountains: Located just South of Thunderlord Stronghold
2. Hellfire Peninsula: Located South of Thrallmar
3. Nagrand: Located West of Garadar right before the entrance
4. Netherstorm: Located just South of Area 52
5. Shadowmoon Valley: Located near the Eastern entrance of Shadowmoon Village
6. Terokkar Forest: Located at the Eastern entrance of Stonebreaker Hold
7. Zangarmarsh: Located at Zabra'jin

2011 Shadowmoon Valley.

Horde is located just east of Shadowmoon Village at cords 33,30

Now for the hard one..

Alliance is located at a corner of Wildhammer Stronghold at cords 40,54 and it´s heavenly guarded by normal level 75 guards on the ground and by flying guards level 75 elite so my suggesteon is fly in and out fast if your not 85.

2011 Netherstorm.

Horde is on the back of Area 52 at cords 32,68
Alliance is also just outside Area 52 to the left of the entrance at cords 31,63