I'm here in Hot Town,Texas - and I've found that giving her a teething ring helps amazingly!! I put it in the freezer about ten minutes before we leave, then I give it to her when we've been out on a walk. Since your LO is so little, you might have to hold it for her. I've also learned to "walk around" just about anywhere -- the grocery store, a gas station, the mall, a neighbor's house. I understand that might be too tough, since you don't have another car, but maybe you could find somewhere close that has some AC.