n.o@spam wrote:
....
Search www.cnn.com for 'gas leak house explode'
found over 5000 hits.
.....

Try a search for 'electric dryer fire' and you'll get 80,000 hits.
Try a search for 'flying saucers abduct cheerleader' and you'll still
get at least 2 hits.

Can houses with natural gas appliances explode? Yes.
Does it happen very often? No.
Can houses with electrical appliances burn down and kill everyone? Yes.
Does it happen very often? More often than gas leak explosions.

If one were really concerned with the safety aspect of natural gas then
it would be appropriate to get the correct explosive gas and carbon
monoxide alarms installed. These are common in RV's.

Anthony