Alice Springs, NT, Australia:

Rain: No work outdoors, if power has to be run into the building (first/second fit), I down tools
High Humidity (80+ %), keep working if I feel it is safe to do so, otherwise, tools in the Hilux & I'm offsite
Lightning: Tools in ute, gone in a flash (no pun intended)
High winds/duststorm: get inside, let it pass, inside work continues if it does not interfere with the work going on

We get on average 200mm (8 inches) rain/year so the times it is a problem are rare to say the least & we work around that with the customer/s