You had better take an umbrella with you in case it rains.

Source: Tatoeba

We should always wear a seatbelt in case we have an accident.

Source: Tatoeba

They set out with a guide just in case they lost their way.

Source: Tatoeba

Take your coat in case it rains.

Source: Tatoeba

She was wearing a thick coat against the chill.

Source: Tatoeba