Most modern commercial aircraft in 2026 are fully capable of taking off in light to moderate rain showers without issue. Jet engines are designed to "ingest" massive amounts of water and slush without flaming out. However, pilots and dispatchers monitor the intensity and associated weather closely. The primary concerns aren't the raindrops themselves, but the reduced visibility and the risk of hydroplaning on a contaminated runway. If the rain is associated with a thunderstorm, "wind shear" or "microbursts" (sudden, violent downdrafts) can lead to a ground stop. Additionally, if the temperature is near freezing, rain turns into the much more dangerous "freezing rain," which can quickly coat wings in ice, necessitating a return to the de-icing pad or a complete cancellation of the takeoff roll for safety.