If you are getting a tree removed that is right in front of your gas meter, you should probably check to make sure they didn't hit your gas meter a couple of times, leaving a gas leak outside your house all weekend.
Or maybe that just happens to me. Did you know that if you tell PG&E there is has been gas leaking at you house all weekend, they will send someone out within an hour? Their response was very quick and thorough, and they made sure there was no more gas in the house before they left. Thank goodness I decided on a whim to go do some work on that side of the house. What a blessing!