Keep the roof valleys clean. A build-up of leaves and debris can create a natural dam. The back-up of water can result in roof leakage.
Attic vents and/or louvers are provided to properly ventilate the house. Please review them seasonally for correct operation.
Black streaks on your gutters are normal. These streaks are from weathering.
Check inside attic for signs of roof leaks. Be extremely careful not to damage or disturb electrical wiring or plumbing pipes that may be in the attic
Vents should remain unobstructed year-round. Your home has soffit vents and they should be cleared of debris. Also, check that these vents have not been stepped on and deformed. Excessive heat build-up in the attic is usually caused by blocked air vents. This condition can be resolved by clearing all obstructions away from the vents to allow proper heat release.