Once the lineup cards are submitted (approx. 5 minutes before game time), the umpires take control of the field and the crew chief becomes the person who decides whether to delay or postpone a game (and if/when to restart).
A firewood moisture meter can be used to determine the moisture content of your firewood, but are they a necessity or just a novelty? Seasoned firewood is considered to have a moisture content of 20% or less.
If you bang the two pieces of wood together and you hear a deep thud, the firewood is still wet and needs more time to season. If you're looking for something more precise and you need an actual digital readout of the moisture in your firewood, a firewood moisture meter can be used.