Which weather conditions can complicate air evacuations?

The presence of overcast skies and rainstorms can significantly complicate air evacuations due to several factors. These weather conditions contribute to reduced visibility for pilots, making navigation and landing more challenging. Poor weather can also lead to turbulence, which affects the stability of the aircraft during flight and landing. Heavy rain can create obstacles for takeoff and landing, as well as impact the performance of the aircraft. In addition, the risk of lightning during storms poses a safety threat, further complicating the evacuation process. Thus, overcast skies and rainstorms are critical conditions that can impede the timely and safe execution of air evacuations.