Plan your route ahead of time to avoid any roads that become dangerous during bad weather.

Administration of a live vaccine may be dangerous during treatment with cyclophosphamide.

Roads are more dangerous during the summer and on holiday weekends due to increased traffic.

They can be very dangerous during fires as most of them are built from recycled wood.

His case had been dangerous during that day only and he died that night, two hours after I left.

The habit becomes all the more dangerous during the rainy season.

Privatization and business could be very dangerous in Russia during the 1990s.

"Iungle settings are generally more dangerous during the night hours."

Most crimes, however, occur around the poor neighbourhoods where it gets dangerous during night hours.

The water is especially dangerous during high surf, when strong rip currents are present.