Tropical Zone Gardening: Dead Palm...please help, 3 by Flordeluna

Flordeluna wrote:
One of our palm trees suddenly started turning brown and it toppled at the crown area (not sure what it is called). We have tried to figure out what could have happened but can't find the answer and we really don't want to lose our other 5 palm trees. Some people said it could be a fungus or weevils. The base of the palms all look good with no abnormalities. When we chopped the dead palm the "crown" area was rotted. The part just before the fronds grow out of the middle.

Two of the palms are starting to lean and we are worried about them also. The palms had been all planted relatively close to each other. I believe they are about 10 years old. They are in an open patio area on the second floor of the house and I don't know how far down the earth goes. I'm not even sure what kind of palms they are and think the closest I could see is Christmas palms? Would appreciate any help at all. Thanks.