Expect overcast conditions and intermittent rain during your stay carry a waterproof jacket or umbrella and quick-dry footwear (see weather forecast and heavy-rain report).
Secure valuables in crowded tourist areas and on public transport exercise normal precautions against pickpocketing per the U.S. Department of State advisory.
Monitor local weather and news while in Prague — heavy rain recently required hundreds of fire-service call-outs and the forecast shows several days with rain.
Follow instructions from local authorities and first responders if conditions deteriorate (heavy-rain report).