Cameras in the Rain???

[Gareth Forwood]

I've been looking at the weather forecast for the Avalon Air Show, and it doesn't look good

Forecast for Friday
Partly cloudy. Isolated showers and the chance of thunderstorms. Winds north to northeasterly averaging up to 25 km/h.
City
Shower or two.
Min 19
Max 28

Forecast for Saturday
Partly cloudy. Scattered showers and the chance of thunderstorms. Winds north to northwesterly averaging up to 30 km/h tending northwest to southwesterly during the afternoon.
City
Showers.
Min 20
Max 26

Forecast for Sunday
Partly cloudy. Isolated showers and thunderstorms during the morning. Winds south to southwesterly averaging 10 to 20 km/h tending south to southeasterly during the evening.
City
Shower or two.
Min 15
Max 20

And so with the predicted possibility of rain, I'm just wondering how safe it is to have the camera out? I'm using a Canon EOS 450D with Canon 100-400mm lens. Can they take a bit of light rain?