How should my child be protected from sun, heat and storms?

Touch Football Australia's National Junior Development Framework says:

• Sun: participants should be encouraged or obliged to wear hats and protective clothing such as long sleeves, and apply sunscreen of at least SPF 15 on exposed skin. Organisers should provide as much shade as they can at venues.
• Long sessions in extreme conditions: touch sessions should not run over 30 minutes in extreme temperature (over 30 degrees) and humidity (over 50%).
• Clothing in heat: light-weight, light-coloured, loose-fitting and well ventilated.
• Fluids: children do not instinctively drink enough, so they should drink before, during and after play.
• Heat illness signs: tiredness, weakness, headache, feeling hot, cramps, nausea, flushed skin, fainting or excessive sweating. If any appear, take the child off the field, lay them down in a cool place, give plenty of cool water and cool them with wet towels or sponging. If heat illness is suspected, stop them playing and seek medical advice.
• Cold and wet: change wet clothing as soon as practicable and dress in layers.
• Lightning: do not train or play outdoors during a thunderstorm.

Source: TFA National Junior Development Framework (version 2, January 2013), Section Four.