They're either connected to a tripped/faulty GFCI, or you have a loose hot wire somwhere in the circuit.
It's probably a bad connection inside one of the outlet boxes or possibly a tripped GFI.
Check the circuit panel / breaker box. The tripped breaker should be partway between 'OFF' and 'ON'. If nothing else, turn the breakers off then on, one at a time and when the tripped breaker is reset, the circuit should be live again. Also check GFI outlets. If one is in fault condition, it will need to be reset. If the tripped GFI outlet is protecting other outlets, they will come back when the tripped GFI is reset. These sockets seem to hide in many cases... Behind microwave ovens for example or refrigerators.
Some breakers can trip totally off. If the breaker is continually turning off without a wiring issue, then the breaker could be going bad.
That something in the circuit has pulled more current than intended.
Overload- the circuit was carrying too much current.
it will be dead when others are not there is usually some way to see that the breaker is tripped or the fuse is blown another reason fuses are safer sometimes with circuit breakers its hard to tell a tripped one from one that has been turned off
There is probably water in an outside outlet. GFCI outlets monitor the neutral wire, and any moister it detects will cause it to trip out. Also the outlets themselves could have been damaged and need replaceing. The circuit breakers might also be tripped, the GFCI outlet is designed to not reset unless there is power from the breaker. Hope this helps.
Usually there will be lights or equipment in the house that will not operate. If all of the branch circuit breakers or fuses have not tripped or blown the only conclusion left is that the main breaker or fuse has tripped or blown.
If the breaker is damaged it will not reset to the on position. It will stay in the tripped position.
The test button should only trip the GFCI. The fact that it is tripping two breakers indicates that somehow both breakers are feeding your GFCI circuit. I have seen this when there was a wiring error and two circuits were joined in an outlet that was connected to a breaker and through the GFCI outlet. To troubleshoot determine which outlets are effected when both breakers are off. Pull outlet from box and if there are two feeds remove one from outlet and run a toner on wire left on outlet to panel and one off outlet to panel. The GFCI could block the toner so if one side of the outlet does not tone back to panel check at GFCI. There must be two paths to your electric panel for the two breakers to trip and the GFCI may be faulty as well. Another way to check is to have the GFCI reset and both breakers on. Check each outlet that you have identified as being on GFCI noting that they can be in different rooms. With all outlets working turn off one of the tripped breakers. See if any outlets so off. If not turn off the other breaker and turn on the first breaker. If power is still present then the outlets are being fed by both breakers.
Fuses are always connected in series with the component(s) to be protected from overcurrent, so that when the fuse blows (opens) it will open the entire circuit and stop current through the component(s).
By having the problem that tripped the light repaired.